166656055651 has 8 divisors (see below), whose sum is σ = 169192124640. Its totient is φ = 164138298048.

The previous prime is 166656055637. The next prime is 166656055667. The reversal of 166656055651 is 156550656661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166656055651 - 2⁷ = 166656055523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166656055351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4559506 + ... + 4595911.

It is an arithmetic number, because the mean of its divisors is an integer number (21149015580).

Almost surely, 2^166656055651 is an apocalyptic number.

166656055651 is a deficient number, since it is larger than the sum of its proper divisors (2536068989).

166656055651 is a wasteful number, since it uses less digits than its factorization.

166656055651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9155693.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 166656055651 in words is "one hundred sixty-six billion, six hundred fifty-six million, fifty-five thousand, six hundred fifty-one".