660654525 has 48 divisors (see below), whose sum is σ = 1126052928. Its totient is φ = 341568000.

The previous prime is 660654517. The next prime is 660654541. The reversal of 660654525 is 525456066.

It is a happy number.

It is not a de Polignac number, because 660654525 - 2³ = 660654517 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 555982 + ... + 557168.

It is an arithmetic number, because the mean of its divisors is an integer number (23459436).

Almost surely, 2^660654525 is an apocalyptic number.

It is an amenable number.

660654525 is a deficient number, since it is larger than the sum of its proper divisors (465398403).

660654525 is a wasteful number, since it uses less digits than its factorization.

660654525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 660654525 is about 25703.2006761804. The cubic root of 660654525 is about 870.9464861145.

The spelling of 660654525 in words is "six hundred sixty million, six hundred fifty-four thousand, five hundred twenty-five".