660000064 has 28 divisors (see below), whose sum is σ = 1325477664. Its totient is φ = 326021504.

The previous prime is 660000037. The next prime is 660000071. The reversal of 660000064 is 460000066.

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, 56812 + ... + 67435.

It is an arithmetic number, because the mean of its divisors is an integer number (47338488).

Almost surely, 2^660000064 is an apocalyptic number.

660000064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

660000064 is an abundant number, since it is smaller than the sum of its proper divisors (665477600).

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

660000064 is a wasteful number, since it uses less digits than its factorization.

660000064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124342 (or 124332 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 660000064 is about 25690.4664029285. The cubic root of 660000064 is about 870.6587972599.

The spelling of 660000064 in words is "six hundred sixty million, sixty-four", and thus it is an aban number.