668802487 has 8 divisors (see below), whose sum is σ = 705077856. Its totient is φ = 633126912.

The previous prime is 668802481. The next prime is 668802493. The reversal of 668802487 is 784208866.

It is an interprime number because it is at equal distance from previous prime (668802481) and next prime (668802493).

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 668802487 - 2¹¹ = 668800439 is a prime.

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 668802487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668802481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147658 + ... + 152119.

It is an arithmetic number, because the mean of its divisors is an integer number (88134732).

Almost surely, 2^668802487 is an apocalyptic number.

668802487 is a deficient number, since it is larger than the sum of its proper divisors (36275369).

668802487 is a wasteful number, since it uses less digits than its factorization.

668802487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299897.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 668802487 is about 25861.2158840222. The cubic root of 668802487 is about 874.5123757062.

The spelling of 668802487 in words is "six hundred sixty-eight million, eight hundred two thousand, four hundred eighty-seven".