660541625 has 16 divisors (see below), whose sum is σ = 828023040. Its totient is φ = 526082800.

The previous prime is 660541621. The next prime is 660541627. The reversal of 660541625 is 526145066.

It is not a de Polignac number, because 660541625 - 2² = 660541621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660541621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16736 + ... + 40014.

It is an arithmetic number, because the mean of its divisors is an integer number (51751440).

Almost surely, 2^660541625 is an apocalyptic number.

It is an amenable number.

660541625 is a deficient number, since it is larger than the sum of its proper divisors (167481415).

660541625 is a wasteful number, since it uses less digits than its factorization.

660541625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23521 (or 23511 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 660541625 is about 25701.0043578067. The cubic root of 660541625 is about 870.8968709443.

It can be divided in two parts, 660541 and 625, that added together give a palindrome (661166).

The spelling of 660541625 in words is "six hundred sixty million, five hundred forty-one thousand, six hundred twenty-five".