1266749190 has 192 divisors, whose sum is σ = 4006679040. Its totient is φ = 271226880.

The previous prime is 1266749179. The next prime is 1266749201. The reversal of 1266749190 is 919476621.

1266749190 is a `hidden beast` number, since 12 + 6 + 67 + 491 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (1266749179) and next prime (1266749201).

It is a super-2 number, since 2×1266749190² = 3209307020731312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1160545 + ... + 1161635.

It is an arithmetic number, because the mean of its divisors is an integer number (20868120).

Almost surely, 2^1266749190 is an apocalyptic number.

1266749190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266749190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2003339520).

1266749190 is an abundant number, since it is smaller than the sum of its proper divisors (2739929850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266749190 is a wasteful number, since it uses less digits than its factorization.

1266749190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1266749190 is about 35591.4201739689. The cubic root of 1266749190 is about 1082.0073520957.

The spelling of 1266749190 in words is "one billion, two hundred sixty-six million, seven hundred forty-nine thousand, one hundred ninety".