668700735 has 32 divisors (see below), whose sum is σ = 1137535488. Its totient is φ = 334688640.

The previous prime is 668700731. The next prime is 668700737. The reversal of 668700735 is 537007866.

668700735 is a nontrivial binomial coefficient, being equal to C(36571, 2).

It is not a de Polignac number, because 668700735 - 2² = 668700731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668700731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1 + ... + 36570.

It is an arithmetic number, because the mean of its divisors is an integer number (35547984).

Almost surely, 2^668700735 is an apocalyptic number.

668700735 is the 36570-th triangular number.

668700735 is a deficient number, since it is larger than the sum of its proper divisors (468834753).

668700735 is a wasteful number, since it uses less digits than its factorization.

668700735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36655.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 668700735 is about 25859.2485389657. The cubic root of 668700735 is about 874.4680238494.

The spelling of 668700735 in words is "six hundred sixty-eight million, seven hundred thousand, seven hundred thirty-five".