668770810 has 16 divisors (see below), whose sum is σ = 1205935776. Its totient is φ = 267030928.

The previous prime is 668770807. The next prime is 668770811. The reversal of 668770810 is 18077866.

It is a super-2 number, since 2×668770810² = 894508792616112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668770811) 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, 53764 + ... + 65023.

It is an arithmetic number, because the mean of its divisors is an integer number (75370986).

Almost surely, 2^668770810 is an apocalyptic number.

668770810 is a deficient number, since it is larger than the sum of its proper divisors (537164966).

668770810 is a wasteful number, since it uses less digits than its factorization.

668770810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119357.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 668770810 is about 25860.6034345682. The cubic root of 668770810 is about 874.4985687570.

The spelling of 668770810 in words is "six hundred sixty-eight million, seven hundred seventy thousand, eight hundred ten".