1266387696 has 480 divisors, whose sum is σ = 4621926400. Its totient is φ = 327525120.

The previous prime is 1266387679. The next prime is 1266387713. The reversal of 1266387696 is 6967836621.

It is an interprime number because it is at equal distance from previous prime (1266387679) and next prime (1266387713).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16030185 + ... + 16030263.

Almost surely, 2^1266387696 is an apocalyptic number.

1266387696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266387696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2310963200).

1266387696 is an abundant number, since it is smaller than the sum of its proper divisors (3355538704).

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

1266387696 is a wasteful number, since it uses less digits than its factorization.

1266387696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 141 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1266387696 is about 35586.3414247658. The cubic root of 1266387696 is about 1081.9044176497.

The spelling of 1266387696 in words is "one billion, two hundred sixty-six million, three hundred eighty-seven thousand, six hundred ninety-six".