164572860866 has 16 divisors (see below), whose sum is σ = 249357694968. Its totient is φ = 81453984000.

The previous prime is 164572860847. The next prime is 164572860869. The reversal of 164572860866 is 668068275461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 158427084841 + 6145776025 = 398029^2 + 78395^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164572860869) 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, 867356 + ... + 1039928.

Almost surely, 2^164572860866 is an apocalyptic number.

164572860866 is a deficient number, since it is larger than the sum of its proper divisors (84784834102).

164572860866 is a wasteful number, since it uses less digits than its factorization.

164572860866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177397.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 164572860866 in words is "one hundred sixty-four billion, five hundred seventy-two million, eight hundred sixty thousand, eight hundred sixty-six".