66805632 has 48 divisors (see below), whose sum is σ = 192243480. Its totient is φ = 22268160.

The previous prime is 66805619. The next prime is 66805643. The reversal of 66805632 is 23650866.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27844 + ... + 30147.

Almost surely, 2^66805632 is an apocalyptic number.

It is an amenable number.

66805632 is an abundant number, since it is smaller than the sum of its proper divisors (125437848).

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

66805632 is a wasteful number, since it uses less digits than its factorization.

66805632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58011 (or 57996 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66805632 is about 8173.4712332032. The cubic root of 66805632 is about 405.7616759145.

The spelling of 66805632 in words is "sixty-six million, eight hundred five thousand, six hundred thirty-two".