166977368353 has 2 divisors, whose sum is σ = 166977368354. Its totient is φ = 166977368352.

The previous prime is 166977368321. The next prime is 166977368387. The reversal of 166977368353 is 353863779661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95006965824 + 71970402529 = 308232^2 + 268273^2 .

It is a cyclic number.

It is not a de Polignac number, because 166977368353 - 2⁵ = 166977368321 is a prime.

It is not a weakly prime, because it can be changed into another prime (166977368953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83488684176 + 83488684177.

It is an arithmetic number, because the mean of its divisors is an integer number (83488684177).

Almost surely, 2^166977368353 is an apocalyptic number.

It is an amenable number.

166977368353 is a deficient number, since it is larger than the sum of its proper divisors (1).

166977368353 is an equidigital number, since it uses as much as digits as its factorization.

166977368353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 64.

The spelling of 166977368353 in words is "one hundred sixty-six billion, nine hundred seventy-seven million, three hundred sixty-eight thousand, three hundred fifty-three".