668500739 has 8 divisors (see below), whose sum is σ = 683640000. Its totient is φ = 653488552.

The previous prime is 668500711. The next prime is 668500753. The reversal of 668500739 is 937005866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668500739 - 2¹⁶ = 668435203 is a prime.

It is a super-2 number, since 2×668500739² = 893786476087092242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668500739.

It is not an unprimeable number, because it can be changed into a prime (668500799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21089 + ... + 42210.

It is an arithmetic number, because the mean of its divisors is an integer number (85455000).

Almost surely, 2^668500739 is an apocalyptic number.

668500739 is a deficient number, since it is larger than the sum of its proper divisors (15139261).

668500739 is a wasteful number, since it uses less digits than its factorization.

668500739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63537.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 668500739 is about 25855.3812387286. The cubic root of 668500739 is about 874.3808360956.

The spelling of 668500739 in words is "six hundred sixty-eight million, five hundred thousand, seven hundred thirty-nine".