166538967 has 32 divisors (see below), whose sum is σ = 266887680. Its totient is φ = 90357120.

The previous prime is 166538951. The next prime is 166538993. The reversal of 166538967 is 769835661.

It is not a de Polignac number, because 166538967 - 2⁴ = 166538951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166538917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34908 + ... + 39390.

It is an arithmetic number, because the mean of its divisors is an integer number (8340240).

Almost surely, 2^166538967 is an apocalyptic number.

166538967 is a deficient number, since it is larger than the sum of its proper divisors (100348713).

166538967 is a wasteful number, since it uses less digits than its factorization.

166538967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583.

The product of its digits is 1632960, while the sum is 51.

The square root of 166538967 is about 12904.9977528088. The cubic root of 166538967 is about 550.1806205673.

The spelling of 166538967 in words is "one hundred sixty-six million, five hundred thirty-eight thousand, nine hundred sixty-seven".