660501325 has 24 divisors (see below), whose sum is σ = 894737376. Its totient is φ = 479688000.

The previous prime is 660501311. The next prime is 660501337. The reversal of 660501325 is 523105066.

It is not a de Polignac number, because 660501325 - 2⁷ = 660501197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660501293 and 660501302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277390 + ... + 279760.

It is an arithmetic number, because the mean of its divisors is an integer number (37280724).

Almost surely, 2^660501325 is an apocalyptic number.

It is an amenable number.

660501325 is a deficient number, since it is larger than the sum of its proper divisors (234236051).

660501325 is a wasteful number, since it uses less digits than its factorization.

660501325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 660501325 is about 25700.2203297948. The cubic root of 660501325 is about 870.8791592886.

The spelling of 660501325 in words is "six hundred sixty million, five hundred one thousand, three hundred twenty-five".