166330443497 has 2 divisors, whose sum is σ = 166330443498. Its totient is φ = 166330443496.

The previous prime is 166330443493. The next prime is 166330443523. The reversal of 166330443497 is 794344033661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93609073936 + 72721369561 = 305956^2 + 269669^2 .

It is a cyclic number.

It is not a de Polignac number, because 166330443497 - 2² = 166330443493 is a prime.

It is not a weakly prime, because it can be changed into another prime (166330443493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83165221748 + 83165221749.

It is an arithmetic number, because the mean of its divisors is an integer number (83165221749).

Almost surely, 2^166330443497 is an apocalyptic number.

It is an amenable number.

166330443497 is a deficient number, since it is larger than the sum of its proper divisors (1).

166330443497 is an equidigital number, since it uses as much as digits as its factorization.

166330443497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 50.

The spelling of 166330443497 in words is "one hundred sixty-six billion, three hundred thirty million, four hundred forty-three thousand, four hundred ninety-seven".