667242880 has 64 divisors (see below), whose sum is σ = 1664517600. Its totient is φ = 255287296.

The previous prime is 667242871. The next prime is 667242889. The reversal of 667242880 is 88242766.

It is an interprime number because it is at equal distance from previous prime (667242871) and next prime (667242889).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667242889) 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, 7945 + ... + 37384.

Almost surely, 2^667242880 is an apocalyptic number.

It is an amenable number.

667242880 is an abundant number, since it is smaller than the sum of its proper divisors (997274720).

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

667242880 is a wasteful number, since it uses less digits than its factorization.

667242880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45371 (or 45359 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 667242880 is about 25831.0448878864. The cubic root of 667242880 is about 873.8320766149.

The spelling of 667242880 in words is "six hundred sixty-seven million, two hundred forty-two thousand, eight hundred eighty".