668260764 has 36 divisors (see below), whose sum is σ = 1728502776. Its totient is φ = 217572768.

The previous prime is 668260757. The next prime is 668260771. The reversal of 668260764 is 467062866.

It is an interprime number because it is at equal distance from previous prime (668260757) and next prime (668260771).

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 214299 + ... + 217394.

It is an arithmetic number, because the mean of its divisors is an integer number (48013966).

Almost surely, 2^668260764 is an apocalyptic number.

It is an amenable number.

668260764 is an abundant number, since it is smaller than the sum of its proper divisors (1060242012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668260764 is a wasteful number, since it uses less digits than its factorization.

668260764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431746 (or 431741 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 668260764 is about 25850.7401054593. The cubic root of 668260764 is about 874.2761966431.

The spelling of 668260764 in words is "six hundred sixty-eight million, two hundred sixty thousand, seven hundred sixty-four".