166515390045 has 24 divisors (see below), whose sum is σ = 297937216512. Its totient is φ = 85943426400.

The previous prime is 166515390023. The next prime is 166515390059. The reversal of 166515390045 is 540093515661.

166515390045 is a `hidden beast` number, since 1 + 6 + 6 + 515 + 3 + 90 + 0 + 45 = 666.

It is not a de Polignac number, because 166515390045 - 2⁹ = 166515389533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59681541 + ... + 59684330.

It is an arithmetic number, because the mean of its divisors is an integer number (12414050688).

Almost surely, 2^166515390045 is an apocalyptic number.

166515390045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166515390045 is a deficient number, since it is larger than the sum of its proper divisors (131421826467).

166515390045 is a wasteful number, since it uses less digits than its factorization.

166515390045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119365913 (or 119365910 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 166515390045 in words is "one hundred sixty-six billion, five hundred fifteen million, three hundred ninety thousand, forty-five".