668730810 has 32 divisors (see below), whose sum is σ = 1750859712. Its totient is φ = 162116480.

The previous prime is 668730793. The next prime is 668730827. The reversal of 668730810 is 18037866.

It is an interprime number because it is at equal distance from previous prime (668730793) and next prime (668730827).

It is a super-2 number, since 2×668730810² = 894401792486512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012899 + ... + 1013558.

It is an arithmetic number, because the mean of its divisors is an integer number (54714366).

Almost surely, 2^668730810 is an apocalyptic number.

668730810 is an abundant number, since it is smaller than the sum of its proper divisors (1082128902).

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

668730810 is a wasteful number, since it uses less digits than its factorization.

668730810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026478.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 668730810 is about 25859.8300458452. The cubic root of 668730810 is about 874.4811334664.

The spelling of 668730810 in words is "six hundred sixty-eight million, seven hundred thirty thousand, eight hundred ten".