667608544 has 24 divisors (see below), whose sum is σ = 1315393128. Its totient is φ = 333540480.

The previous prime is 667608523. The next prime is 667608559. The reversal of 667608544 is 445806766.

It is a junction number, because it is equal to n+sod(n) for n = 667608494 and 667608503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36639 + ... + 51745.

It is an arithmetic number, because the mean of its divisors is an integer number (54808047).

Almost surely, 2^667608544 is an apocalyptic number.

It is an amenable number.

667608544 is a deficient number, since it is larger than the sum of its proper divisors (647784584).

667608544 is a wasteful number, since it uses less digits than its factorization.

667608544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16498 (or 16490 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The square root of 667608544 is about 25838.1219131732. The cubic root of 667608544 is about 873.9916739620.

The spelling of 667608544 in words is "six hundred sixty-seven million, six hundred eight thousand, five hundred forty-four".