66934680 has 32 divisors (see below), whose sum is σ = 200804400. Its totient is φ = 17849216.

The previous prime is 66934667. The next prime is 66934687. The reversal of 66934680 is 8643966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66934687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278775 + ... + 279014.

Almost surely, 2^66934680 is an apocalyptic number.

66934680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66934680 is an abundant number, since it is smaller than the sum of its proper divisors (133869720).

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

66934680 is a wasteful number, since it uses less digits than its factorization.

66934680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557803 (or 557799 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 66934680 is about 8181.3617448442. The cubic root of 66934680 is about 406.0227769179.

The spelling of 66934680 in words is "sixty-six million, nine hundred thirty-four thousand, six hundred eighty".