666703670 has 16 divisors (see below), whose sum is σ = 1238779008. Its totient is φ = 258078720.

The previous prime is 666703657. The next prime is 666703693. The reversal of 666703670 is 76307666.

It is a congruent number.

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, 1075019 + ... + 1075638.

It is an arithmetic number, because the mean of its divisors is an integer number (77423688).

Almost surely, 2^666703670 is an apocalyptic number.

666703670 is a deficient number, since it is larger than the sum of its proper divisors (572075338).

666703670 is a wasteful number, since it uses less digits than its factorization.

666703670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150695.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 666703670 is about 25820.6055312419. The cubic root of 666703670 is about 873.5966271318.

The spelling of 666703670 in words is "six hundred sixty-six million, seven hundred three thousand, six hundred seventy".