667572240 has 80 divisors (see below), whose sum is σ = 2159468928. Its totient is φ = 170277888.

The previous prime is 667572229. The next prime is 667572253. The reversal of 667572240 is 42275766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54949 + ... + 65988.

Almost surely, 2^667572240 is an apocalyptic number.

667572240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667572240 is an abundant number, since it is smaller than the sum of its proper divisors (1491896688).

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

667572240 is a wasteful number, since it uses less digits than its factorization.

667572240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120976 (or 120970 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 667572240 is about 25837.4193757813. The cubic root of 667572240 is about 873.9758313603.

The spelling of 667572240 in words is "six hundred sixty-seven million, five hundred seventy-two thousand, two hundred forty".