66536680 has 32 divisors (see below), whose sum is σ = 171095040. Its totient is φ = 22812480.

The previous prime is 66536671. The next prime is 66536683. The reversal of 66536680 is 8663566.

It is a Smith number, since the sum of its digits (40) 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 (40).

It is not an unprimeable number, because it can be changed into a prime (66536683) 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, 118536 + ... + 119095.

It is an arithmetic number, because the mean of its divisors is an integer number (5346720).

Almost surely, 2^66536680 is an apocalyptic number.

It is an amenable number.

66536680 is an abundant number, since it is smaller than the sum of its proper divisors (104558360).

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

66536680 is a wasteful number, since it uses less digits than its factorization.

66536680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237649 (or 237645 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 66536680 is about 8157.0019002082. The cubic root of 66536680 is about 405.2164265178.

The spelling of 66536680 in words is "sixty-six million, five hundred thirty-six thousand, six hundred eighty".