666736670 has 32 divisors (see below), whose sum is σ = 1262653056. Its totient is φ = 253152000.

The previous prime is 666736643. The next prime is 666736687. The reversal of 666736670 is 76637666.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6806 + ... + 37145.

It is an arithmetic number, because the mean of its divisors is an integer number (39457908).

Almost surely, 2^666736670 is an apocalyptic number.

666736670 is a deficient number, since it is larger than the sum of its proper divisors (595916386).

666736670 is a wasteful number, since it uses less digits than its factorization.

666736670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44036.

The product of its (nonzero) digits is 1143072, while the sum is 47.

The square root of 666736670 is about 25821.2445478525. The cubic root of 666736670 is about 873.6110404384.

The spelling of 666736670 in words is "six hundred sixty-six million, seven hundred thirty-six thousand, six hundred seventy".