156664466651 has 16 divisors (see below), whose sum is σ = 195901555200. Its totient is φ = 121713943680.

The previous prime is 156664466639. The next prime is 156664466657.

156664466651 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-156664466651 is a prime.

It is a super-2 number, since 2×156664466651² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156664466657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992751 + ... + 3044648.

It is an arithmetic number, because the mean of its divisors is an integer number (12243847200).

Almost surely, 2^156664466651 is an apocalyptic number.

156664466651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

156664466651 is a deficient number, since it is larger than the sum of its proper divisors (39237088549).

156664466651 is a wasteful number, since it uses less digits than its factorization.

156664466651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037754.

The product of its digits is 18662400, while the sum is 56.

The spelling of 156664466651 in words is "one hundred fifty-six billion, six hundred sixty-four million, four hundred sixty-six thousand, six hundred fifty-one".