66576690612 has 60 divisors (see below), whose sum is σ = 183204880320. Its totient is φ = 21024216144.

The previous prime is 66576690571. The next prime is 66576690613. The reversal of 66576690612 is 21609667566.

66576690612 is a `hidden beast` number, since 6 + 6 + 576 + 6 + 9 + 0 + 61 + 2 = 666.

66576690612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66576690613) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5401308 + ... + 5413619.

It is an arithmetic number, because the mean of its divisors is an integer number (3053414672).

Almost surely, 2^66576690612 is an apocalyptic number.

It is an amenable number.

66576690612 is an abundant number, since it is smaller than the sum of its proper divisors (116628189708).

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

66576690612 is a wasteful number, since it uses less digits than its factorization.

66576690612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10814962 (or 10814951 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 66576690612 in words is "sixty-six billion, five hundred seventy-six million, six hundred ninety thousand, six hundred twelve".