66786632 has 32 divisors (see below), whose sum is σ = 137030400. Its totient is φ = 30264000.

The previous prime is 66786631. The next prime is 66786637. The reversal of 66786632 is 23668766.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (66786631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33257 + ... + 35207.

It is an arithmetic number, because the mean of its divisors is an integer number (4282200).

Almost surely, 2^66786632 is an apocalyptic number.

It is an amenable number.

66786632 is an abundant number, since it is smaller than the sum of its proper divisors (70243768).

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

66786632 is a wasteful number, since it uses less digits than its factorization.

66786632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357 (or 2353 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The square root of 66786632 is about 8172.3088536839. The cubic root of 66786632 is about 405.7232050920.

The spelling of 66786632 in words is "sixty-six million, seven hundred eighty-six thousand, six hundred thirty-two".