251354268066 has 64 divisors (see below), whose sum is σ = 567461790720. Its totient is φ = 73523096640.

The previous prime is 251354268059. The next prime is 251354268073. The reversal of 251354268066 is 660862453152.

It is an interprime number because it is at equal distance from previous prime (251354268059) and next prime (251354268073).

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 31 ways as a sum of consecutive naturals, for example, 8910901 + ... + 8939063.

It is an arithmetic number, because the mean of its divisors is an integer number (8866590480).

Almost surely, 2^251354268066 is an apocalyptic number.

251354268066 is an abundant number, since it is smaller than the sum of its proper divisors (316107522654).

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

251354268066 is a wasteful number, since it uses less digits than its factorization.

251354268066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32871.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 251354268066 in words is "two hundred fifty-one billion, three hundred fifty-four million, two hundred sixty-eight thousand, sixty-six".