66305572 has 12 divisors (see below), whose sum is σ = 117100060. Its totient is φ = 32848416.

The previous prime is 66305563. The next prime is 66305581. The reversal of 66305572 is 27550366.

It is an interprime number because it is at equal distance from previous prime (66305563) and next prime (66305581).

It can be written as a sum of positive squares in 2 ways, for example, as 35236096 + 31069476 = 5936^2 + 5574^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75603 + ... + 76474.

Almost surely, 2^66305572 is an apocalyptic number.

It is an amenable number.

66305572 is a deficient number, since it is larger than the sum of its proper divisors (50794488).

66305572 is a wasteful number, since it uses less digits than its factorization.

66305572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152190 (or 152188 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 66305572 is about 8142.8233432882. The cubic root of 66305572 is about 404.7467237217.

The spelling of 66305572 in words is "sixty-six million, three hundred five thousand, five hundred seventy-two".