166502362601 has 2 divisors, whose sum is σ = 166502362602. Its totient is φ = 166502362600.

The previous prime is 166502362589. The next prime is 166502362613. The reversal of 166502362601 is 106263205661.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (166502362589) and next prime (166502362613).

It can be written as a sum of positive squares in only one way, i.e., 141101653225 + 25400709376 = 375635^2 + 159376^2 .

It is a cyclic number.

It is not a de Polignac number, because 166502362601 - 2²² = 166498168297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (166502362661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83251181300 + 83251181301.

It is an arithmetic number, because the mean of its divisors is an integer number (83251181301).

Almost surely, 2^166502362601 is an apocalyptic number.

It is an amenable number.

166502362601 is a deficient number, since it is larger than the sum of its proper divisors (1).

166502362601 is an equidigital number, since it uses as much as digits as its factorization.

166502362601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 166502362601 in words is "one hundred sixty-six billion, five hundred two million, three hundred sixty-two thousand, six hundred one".