660500725 has 12 divisors (see below), whose sum is σ = 845441920. Its totient is φ = 511354800.

The previous prime is 660500719. The next prime is 660500783. The reversal of 660500725 is 527005066.

It is not a de Polignac number, because 660500725 - 2¹¹ = 660498677 is a prime.

It is a super-2 number, since 2×660500725² = 872522415451051250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425355 + ... + 426904.

Almost surely, 2^660500725 is an apocalyptic number.

It is an amenable number.

660500725 is a deficient number, since it is larger than the sum of its proper divisors (184941195).

660500725 is a wasteful number, since it uses less digits than its factorization.

660500725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852300 (or 852295 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 660500725 is about 25700.2086567405. The cubic root of 660500725 is about 870.8788955860.

The spelling of 660500725 in words is "six hundred sixty million, five hundred thousand, seven hundred twenty-five".