666673320 has 32 divisors (see below), whose sum is σ = 2000020320. Its totient is φ = 177779520.

The previous prime is 666673297. The next prime is 666673361. The reversal of 666673320 is 23376666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777686 + ... + 2777925.

It is an arithmetic number, because the mean of its divisors is an integer number (62500635).

Almost surely, 2^666673320 is an apocalyptic number.

666673320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666673320 is an abundant number, since it is smaller than the sum of its proper divisors (1333347000).

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

666673320 is a wasteful number, since it uses less digits than its factorization.

666673320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555625 (or 5555621 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 39.

The square root of 666673320 is about 25820.0178156406. The cubic root of 666673320 is about 873.5833708376.

The spelling of 666673320 in words is "six hundred sixty-six million, six hundred seventy-three thousand, three hundred twenty".