66475427652 has 30 divisors (see below), whose sum is σ = 173779899678. Its totient is φ = 22158475776.

The previous prime is 66475427633. The next prime is 66475427657. The reversal of 66475427652 is 25672457466.

66475427652 is a `hidden beast` number, since 6 + 6 + 47 + 542 + 7 + 6 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 65995554816 + 479872836 = 256896^2 + 21906^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66475427657) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 102585213 + ... + 102585860.

Almost surely, 2^66475427652 is an apocalyptic number.

It is an amenable number.

66475427652 is an abundant number, since it is smaller than the sum of its proper divisors (107304472026).

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

66475427652 is a wasteful number, since it uses less digits than its factorization.

66475427652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205171089 (or 205171078 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 54.

The spelling of 66475427652 in words is "sixty-six billion, four hundred seventy-five million, four hundred twenty-seven thousand, six hundred fifty-two".