166025616943 has 2 divisors, whose sum is σ = 166025616944. Its totient is φ = 166025616942.

The previous prime is 166025616907. The next prime is 166025616959. The reversal of 166025616943 is 349616520661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166025616943 - 2³⁷ = 28586663471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166023616943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83012808471 + 83012808472.

It is an arithmetic number, because the mean of its divisors is an integer number (83012808472).

Almost surely, 2^166025616943 is an apocalyptic number.

166025616943 is a deficient number, since it is larger than the sum of its proper divisors (1).

166025616943 is an equidigital number, since it uses as much as digits as its factorization.

166025616943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 166025616943 in words is "one hundred sixty-six billion, twenty-five million, six hundred sixteen thousand, nine hundred forty-three".