166016505599 has 48 divisors (see below), whose sum is σ = 208755076320. Its totient is φ = 131229020160.

The previous prime is 166016505517. The next prime is 166016505601. The reversal of 166016505599 is 995505610661.

It is a de Polignac number, because none of the positive numbers 2^k-166016505599 is a prime.

It is a super-2 number, since 2×166016505599² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166016505599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166016505509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5493659 + ... + 5523795.

It is an arithmetic number, because the mean of its divisors is an integer number (4349064090).

Almost surely, 2^166016505599 is an apocalyptic number.

166016505599 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

166016505599 is a deficient number, since it is larger than the sum of its proper divisors (42738570721).

166016505599 is a wasteful number, since it uses less digits than its factorization.

166016505599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30328 (or 30321 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 53.

The spelling of 166016505599 in words is "one hundred sixty-six billion, sixteen million, five hundred five thousand, five hundred ninety-nine".