1625130666 has 12 divisors (see below), whose sum is σ = 3521116482. Its totient is φ = 541710216.

The previous prime is 1625130649. The next prime is 1625130671. The reversal of 1625130666 is 6660315261.

It can be written as a sum of positive squares in only one way, i.e., 1478018025 + 147112641 = 38445^2 + 12129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1625130666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45142501 + ... + 45142536.

Almost surely, 2^1625130666 is an apocalyptic number.

1625130666 is an abundant number, since it is smaller than the sum of its proper divisors (1895985816).

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

1625130666 is a wasteful number, since it uses less digits than its factorization.

1625130666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90285045 (or 90285042 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1625130666 is about 40312.9094211767. The cubic root of 1625130666 is about 1175.6988547592.

The spelling of 1625130666 in words is "one billion, six hundred twenty-five million, one hundred thirty thousand, six hundred sixty-six".