66670700 has 18 divisors (see below), whose sum is σ = 144675636. Its totient is φ = 26668240.

The previous prime is 66670699. The next prime is 66670717. The reversal of 66670700 is 707666.

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, 333254 + ... + 333453.

Almost surely, 2^66670700 is an apocalyptic number.

It is an amenable number.

66670700 is an abundant number, since it is smaller than the sum of its proper divisors (78004936).

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

66670700 is a wasteful number, since it uses less digits than its factorization.

66670700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666721 (or 666714 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 66670700 is about 8165.2127957574. The cubic root of 66670700 is about 405.4883100560.

The spelling of 66670700 in words is "sixty-six million, six hundred seventy thousand, seven hundred".