164731566 has 16 divisors (see below), whose sum is σ = 343787904. Its totient is φ = 52523064.

The previous prime is 164731561. The next prime is 164731601. The reversal of 164731566 is 665137461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164731561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596716 + ... + 596991.

It is an arithmetic number, because the mean of its divisors is an integer number (21486744).

Almost surely, 2^164731566 is an apocalyptic number.

164731566 is an abundant number, since it is smaller than the sum of its proper divisors (179056338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164731566 is a wasteful number, since it uses less digits than its factorization.

164731566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193735.

The product of its digits is 90720, while the sum is 39.

The square root of 164731566 is about 12834.7795462174. The cubic root of 164731566 is about 548.1830577273.

The spelling of 164731566 in words is "one hundred sixty-four million, seven hundred thirty-one thousand, five hundred sixty-six".