66398832 has 40 divisors (see below), whose sum is σ = 190590480. Its totient is φ = 22132800.

The previous prime is 66398819. The next prime is 66398851. The reversal of 66398832 is 23889366.

66398832 is a `hidden beast` number, since 6 + 639 + 8 + 8 + 3 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76419 + ... + 77282.

It is an arithmetic number, because the mean of its divisors is an integer number (4764762).

Almost surely, 2^66398832 is an apocalyptic number.

It is an amenable number.

66398832 is an abundant number, since it is smaller than the sum of its proper divisors (124191648).

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

66398832 is a wasteful number, since it uses less digits than its factorization.

66398832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153718 (or 153706 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 66398832 is about 8148.5478460889. The cubic root of 66398832 is about 404.9363960474.

The spelling of 66398832 in words is "sixty-six million, three hundred ninety-eight thousand, eight hundred thirty-two".