666103725 has 36 divisors (see below), whose sum is σ = 1363506976. Its totient is φ = 304503840.

The previous prime is 666103723. The next prime is 666103771. The reversal of 666103725 is 527301666.

It is not a de Polignac number, because 666103725 - 2¹ = 666103723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666103725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666103721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 209887 + ... + 213036.

Almost surely, 2^666103725 is an apocalyptic number.

It is an amenable number.

666103725 is an abundant number, since it is smaller than the sum of its proper divisors (697403251).

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

666103725 is a wasteful number, since it uses less digits than its factorization.

666103725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422946 (or 422938 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 666103725 is about 25808.9853539421. The cubic root of 666103725 is about 873.3345080723.

The spelling of 666103725 in words is "six hundred sixty-six million, one hundred three thousand, seven hundred twenty-five".