66525746575 has 12 divisors (see below), whose sum is σ = 85152956608. Its totient is φ = 51503803200.

The previous prime is 66525746563. The next prime is 66525746579. The reversal of 66525746575 is 57564752566.

It is a happy number.

It is not a de Polignac number, because 66525746575 - 2³⁵ = 32166008207 is a prime.

It is a super-2 number, since 2×66525746575² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66525746579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42919062 + ... + 42920611.

Almost surely, 2^66525746575 is an apocalyptic number.

66525746575 is a deficient number, since it is larger than the sum of its proper divisors (18627210033).

66525746575 is a wasteful number, since it uses less digits than its factorization.

66525746575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85839714 (or 85839709 counting only the distinct ones).

The product of its digits is 52920000, while the sum is 58.

The spelling of 66525746575 in words is "sixty-six billion, five hundred twenty-five million, seven hundred forty-six thousand, five hundred seventy-five".