667626716 has 12 divisors (see below), whose sum is σ = 1168567680. Its totient is φ = 333750240.

The previous prime is 667626689. The next prime is 667626787. The reversal of 667626716 is 617626766.

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 3 ways as a sum of consecutive naturals, for example, 14456 + ... + 39296.

It is an arithmetic number, because the mean of its divisors is an integer number (97380640).

Almost surely, 2^667626716 is an apocalyptic number.

It is an amenable number.

667626716 is a deficient number, since it is larger than the sum of its proper divisors (500940964).

667626716 is a wasteful number, since it uses less digits than its factorization.

667626716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31564 (or 31562 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 667626716 is about 25838.4735617257. The cubic root of 667626716 is about 873.9996037750. Note that the first 3 decimals are identical.

The spelling of 667626716 in words is "six hundred sixty-seven million, six hundred twenty-six thousand, seven hundred sixteen".