166165214597 has 2 divisors, whose sum is σ = 166165214598. Its totient is φ = 166165214596.

The previous prime is 166165214539. The next prime is 166165214671. The reversal of 166165214597 is 795412561661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157220973121 + 8944241476 = 396511^2 + 94574^2 .

It is a cyclic number.

It is not a de Polignac number, because 166165214597 - 2¹² = 166165210501 is a prime.

It is a super-2 number, since 2×166165214597² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166165210597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83082607298 + 83082607299.

It is an arithmetic number, because the mean of its divisors is an integer number (83082607299).

Almost surely, 2^166165214597 is an apocalyptic number.

It is an amenable number.

166165214597 is a deficient number, since it is larger than the sum of its proper divisors (1).

166165214597 is an equidigital number, since it uses as much as digits as its factorization.

166165214597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 53.

The spelling of 166165214597 in words is "one hundred sixty-six billion, one hundred sixty-five million, two hundred fourteen thousand, five hundred ninety-seven".