166056364651 has 4 divisors (see below), whose sum is σ = 166066597872. Its totient is φ = 166046131432.

The previous prime is 166056364583. The next prime is 166056364657. The reversal of 166056364651 is 156463650661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156463650661 = 613 ⋅255242497.

It is a cyclic number.

It is not a de Polignac number, because 166056364651 - 2³⁵ = 131696626283 is a prime.

It is a super-2 number, since 2×166056364651² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166056364595 and 166056364604.

It is not an unprimeable number, because it can be changed into a prime (166056364657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5092231 + ... + 5124736.

It is an arithmetic number, because the mean of its divisors is an integer number (41516649468).

Almost surely, 2^166056364651 is an apocalyptic number.

166056364651 is a deficient number, since it is larger than the sum of its proper divisors (10233221).

166056364651 is a wasteful number, since it uses less digits than its factorization.

166056364651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10233220.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 166056364651 in words is "one hundred sixty-six billion, fifty-six million, three hundred sixty-four thousand, six hundred fifty-one".