1266217830 has 24 divisors (see below), whose sum is σ = 3292166592. Its totient is φ = 337658064.

The previous prime is 1266217829. The next prime is 1266217853. The reversal of 1266217830 is 387126621.

1266217830 is a `hidden beast` number, since 1 + 26 + 621 + 7 + 8 + 3 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7034454 + ... + 7034633.

It is an arithmetic number, because the mean of its divisors is an integer number (137173608).

Almost surely, 2^1266217830 is an apocalyptic number.

1266217830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266217830 is an abundant number, since it is smaller than the sum of its proper divisors (2025948762).

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

1266217830 is a wasteful number, since it uses less digits than its factorization.

1266217830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14069100 (or 14069097 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1266217830 is about 35583.9546706096. The cubic root of 1266217830 is about 1081.8560419971.

The spelling of 1266217830 in words is "one billion, two hundred sixty-six million, two hundred seventeen thousand, eight hundred thirty".