166156507220026 has 16 divisors (see below), whose sum is σ = 249391460967264. Its totient is φ = 83026021672944.

The previous prime is 166156507220017. The next prime is 166156507220063. The reversal of 166156507220026 is 620022705651661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259489356 + ... + 260128888.

It is an arithmetic number, because the mean of its divisors is an integer number (15586966310454).

Almost surely, 2^{166156507220026} is an apocalyptic number.

166156507220026 is a deficient number, since it is larger than the sum of its proper divisors (83234953747238).

166156507220026 is a wasteful number, since it uses less digits than its factorization.

166156507220026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721005.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 166156507220026 in words is "one hundred sixty-six trillion, one hundred fifty-six billion, five hundred seven million, two hundred twenty thousand, twenty-six".