66164570 has 16 divisors (see below), whose sum is σ = 122001768. Its totient is φ = 25820160.

The previous prime is 66164569. The next prime is 66164591. The reversal of 66164570 is 7546166.

It can be written as a sum of positive squares in 4 ways, for example, as 55517401 + 10647169 = 7451^2 + 3263^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66164570.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80279 + ... + 81098.

Almost surely, 2^66164570 is an apocalyptic number.

66164570 is a deficient number, since it is larger than the sum of its proper divisors (55837198).

66164570 is a wasteful number, since it uses less digits than its factorization.

66164570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161425.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66164570 is about 8134.1606819634. The cubic root of 66164570 is about 404.4596156262.

The spelling of 66164570 in words is "sixty-six million, one hundred sixty-four thousand, five hundred seventy".