166530409387933 has 16 divisors (see below), whose sum is σ = 167182716205120. Its totient is φ = 165879411117696.

The previous prime is 166530409387919. The next prime is 166530409387957. The reversal of 166530409387933 is 339783904035661.

It is a cyclic number.

It is not a de Polignac number, because 166530409387933 - 2³⁷ = 166392970434461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166530409387963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4039332466 + ... + 4039373692.

It is an arithmetic number, because the mean of its divisors is an integer number (10448919762820).

Almost surely, 2^{166530409387933} is an apocalyptic number.

It is an amenable number.

166530409387933 is a deficient number, since it is larger than the sum of its proper divisors (652306817187).

166530409387933 is a wasteful number, since it uses less digits than its factorization.

166530409387933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56716.

The product of its (nonzero) digits is 264539520, while the sum is 67.

The spelling of 166530409387933 in words is "one hundred sixty-six trillion, five hundred thirty billion, four hundred nine million, three hundred eighty-seven thousand, nine hundred thirty-three".