668677416 has 32 divisors (see below), whose sum is σ = 1823666400. Its totient is φ = 202629440.

The previous prime is 668677411. The next prime is 668677453. The reversal of 668677416 is 614776866.

It is not an unprimeable number, because it can be changed into a prime (668677411) 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, 1266171 + ... + 1266698.

It is an arithmetic number, because the mean of its divisors is an integer number (56989575).

Almost surely, 2^668677416 is an apocalyptic number.

668677416 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

668677416 is an abundant number, since it is smaller than the sum of its proper divisors (1154988984).

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

668677416 is a wasteful number, since it uses less digits than its factorization.

668677416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532889 (or 2532885 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The square root of 668677416 is about 25858.7976518631. The cubic root of 668677416 is about 874.4578588853.

The spelling of 668677416 in words is "six hundred sixty-eight million, six hundred seventy-seven thousand, four hundred sixteen".