166496641651 has 2 divisors, whose sum is σ = 166496641652. Its totient is φ = 166496641650.

The previous prime is 166496641573. The next prime is 166496641669. The reversal of 166496641651 is 156146694661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166496641651 is a prime.

It is a super-2 number, since 2×166496641651² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166496641592 and 166496641601.

It is not a weakly prime, because it can be changed into another prime (166496641681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83248320825 + 83248320826.

It is an arithmetic number, because the mean of its divisors is an integer number (83248320826).

Almost surely, 2^166496641651 is an apocalyptic number.

166496641651 is a deficient number, since it is larger than the sum of its proper divisors (1).

166496641651 is an equidigital number, since it uses as much as digits as its factorization.

166496641651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The spelling of 166496641651 in words is "one hundred sixty-six billion, four hundred ninety-six million, six hundred forty-one thousand, six hundred fifty-one".