667661360 has 20 divisors (see below), whose sum is σ = 1552312848. Its totient is φ = 267064512.

The previous prime is 667661359. The next prime is 667661369. The reversal of 667661360 is 63166766.

It is a happy number.

667661360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (667661369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4172804 + ... + 4172963.

Almost surely, 2^667661360 is an apocalyptic number.

It is an amenable number.

667661360 is an abundant number, since it is smaller than the sum of its proper divisors (884651488).

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

667661360 is a wasteful number, since it uses less digits than its factorization.

667661360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8345780 (or 8345774 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 667661360 is about 25839.1439486683. The cubic root of 667661360 is about 874.0147211641.

The spelling of 667661360 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, three hundred sixty".