66817832 has 48 divisors (see below), whose sum is σ = 135420000. Its totient is φ = 30821472.

The previous prime is 66817831. The next prime is 66817853. The reversal of 66817832 is 23871866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66817832.

It is not an unprimeable number, because it can be changed into a prime (66817831) 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, 335669 + ... + 335867.

It is an arithmetic number, because the mean of its divisors is an integer number (2821250).

Almost surely, 2^66817832 is an apocalyptic number.

It is an amenable number.

66817832 is an abundant number, since it is smaller than the sum of its proper divisors (68602168).

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

66817832 is a wasteful number, since it uses less digits than its factorization.

66817832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 267 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 66817832 is about 8174.2175160684. The cubic root of 66817832 is about 405.7863743867.

The spelling of 66817832 in words is "sixty-six million, eight hundred seventeen thousand, eight hundred thirty-two".