667920484 has 72 divisors (see below), whose sum is σ = 1480066560. Its totient is φ = 258149760.

The previous prime is 667920479. The next prime is 667920493. The reversal of 667920484 is 484029766.

It is a happy number.

It is a super-2 number, since 2×667920484² = 892235545893588512, which contains 22 as substring.

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, 463437 + ... + 464875.

It is an arithmetic number, because the mean of its divisors is an integer number (20556480).

Almost surely, 2^667920484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667920484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740033280).

667920484 is an abundant number, since it is smaller than the sum of its proper divisors (812146076).

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

667920484 is a wasteful number, since it uses less digits than its factorization.

667920484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 667920484 is about 25844.1576376557. The cubic root of 667920484 is about 874.1277769292.

The spelling of 667920484 in words is "six hundred sixty-seven million, nine hundred twenty thousand, four hundred eighty-four".