1667625725 has 12 divisors (see below), whose sum is σ = 2176691040. Its totient is φ = 1263884400.

The previous prime is 1667625679. The next prime is 1667625781. The reversal of 1667625725 is 5275267661.

1667625725 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1667625725 - 2⁸ = 1667625469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1667625725.

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, 1754921 + ... + 1755870.

It is an arithmetic number, because the mean of its divisors is an integer number (181390920).

Almost surely, 2^1667625725 is an apocalyptic number.

It is an amenable number.

1667625725 is a deficient number, since it is larger than the sum of its proper divisors (509065315).

1667625725 is a wasteful number, since it uses less digits than its factorization.

1667625725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510820 (or 3510815 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 47.

The square root of 1667625725 is about 40836.5733748560. The cubic root of 1667625725 is about 1185.8584757669.

The spelling of 1667625725 in words is "one billion, six hundred sixty-seven million, six hundred twenty-five thousand, seven hundred twenty-five".