1566040025 has 48 divisors (see below), whose sum is σ = 2176735680. Its totient is φ = 1107974400.

The previous prime is 1566039961. The next prime is 1566040043. The reversal of 1566040025 is 5200406651.

It is not a de Polignac number, because 1566040025 - 2⁶ = 1566039961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1566040025.

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, 2025539 + ... + 2026311.

It is an arithmetic number, because the mean of its divisors is an integer number (45348660).

Almost surely, 2^1566040025 is an apocalyptic number.

It is an amenable number.

1566040025 is a deficient number, since it is larger than the sum of its proper divisors (610695655).

1566040025 is a wasteful number, since it uses less digits than its factorization.

1566040025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1566040025 is about 39573.2235861573. The cubic root of 1566040025 is about 1161.2728855803.

Adding to 1566040025 its reverse (5200406651), we get a palindrome (6766446676).

The spelling of 1566040025 in words is "one billion, five hundred sixty-six million, forty thousand, twenty-five".