66944680 has 32 divisors (see below), whose sum is σ = 164319840. Its totient is φ = 24343360.

The previous prime is 66944653. The next prime is 66944681. The reversal of 66944680 is 8644966.

It is not an unprimeable number, because it can be changed into a prime (66944681) 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, 75634 + ... + 76513.

It is an arithmetic number, because the mean of its divisors is an integer number (5134995).

Almost surely, 2^66944680 is an apocalyptic number.

It is an amenable number.

66944680 is an abundant number, since it is smaller than the sum of its proper divisors (97375160).

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

66944680 is a wasteful number, since it uses less digits than its factorization.

66944680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152169 (or 152165 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 66944680 is about 8181.9728672246. The cubic root of 66944680 is about 406.0429957620.

The spelling of 66944680 in words is "sixty-six million, nine hundred forty-four thousand, six hundred eighty".