668777848 has 16 divisors (see below), whose sum is σ = 1257684480. Its totient is φ = 333395328.

The previous prime is 668777833. The next prime is 668777929. The reversal of 668777848 is 848777866.

It is a super-2 number, since 2×668777848² = 894527619951022208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121336 + ... + 126727.

It is an arithmetic number, because the mean of its divisors is an integer number (78605280).

Almost surely, 2^668777848 is an apocalyptic number.

It is an amenable number.

668777848 is a deficient number, since it is larger than the sum of its proper divisors (588906632).

668777848 is a wasteful number, since it uses less digits than its factorization.

668777848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248406 (or 248402 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 61.

The square root of 668777848 is about 25860.7395099212. The cubic root of 668777848 is about 874.5016364244.

The spelling of 668777848 in words is "six hundred sixty-eight million, seven hundred seventy-seven thousand, eight hundred forty-eight".