666918360 has 112 divisors (see below), whose sum is σ = 2249918640. Its totient is φ = 177837120.

The previous prime is 666918349. The next prime is 666918361. The reversal of 666918360 is 63819666.

666918360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666918361) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 17725 + ... + 40595.

Almost surely, 2^666918360 is an apocalyptic number.

666918360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666918360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124959320).

666918360 is an abundant number, since it is smaller than the sum of its proper divisors (1583000280).

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

666918360 is a wasteful number, since it uses less digits than its factorization.

666918360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22900 (or 22881 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 666918360 is about 25824.7625352103. The cubic root of 666918360 is about 873.6903880935.

The spelling of 666918360 in words is "six hundred sixty-six million, nine hundred eighteen thousand, three hundred sixty".