668870046 has 48 divisors (see below), whose sum is σ = 1563578016. Its totient is φ = 205426368.

The previous prime is 668870029. The next prime is 668870057. The reversal of 668870046 is 640078866.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668869983 and 668870010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141111 + ... + 145773.

It is an arithmetic number, because the mean of its divisors is an integer number (32574542).

Almost surely, 2^668870046 is an apocalyptic number.

668870046 is an abundant number, since it is smaller than the sum of its proper divisors (894707970).

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

668870046 is a wasteful number, since it uses less digits than its factorization.

668870046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297 (or 5294 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 668870046 is about 25862.5220347900. The cubic root of 668870046 is about 874.5418209677.

The spelling of 668870046 in words is "six hundred sixty-eight million, eight hundred seventy thousand, forty-six".