166503420026515 has 96 divisors (see below), whose sum is σ = 238192208110656. Its totient is φ = 110752642990080.

The previous prime is 166503420026507. The next prime is 166503420026539. The reversal of 166503420026515 is 515620024305661.

It is not a de Polignac number, because 166503420026515 - 2³ = 166503420026507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3378903057 + ... + 3378952333.

It is an arithmetic number, because the mean of its divisors is an integer number (2481168834486).

Almost surely, 2^{166503420026515} is an apocalyptic number.

166503420026515 is a deficient number, since it is larger than the sum of its proper divisors (71688788084141).

166503420026515 is a wasteful number, since it uses less digits than its factorization.

166503420026515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52649 (or 52636 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 166503420026515 in words is "one hundred sixty-six trillion, five hundred three billion, four hundred twenty million, twenty-six thousand, five hundred fifteen".