1025564166 has 40 divisors (see below), whose sum is σ = 2506938984. Its totient is φ = 310776480.

The previous prime is 1025564161. The next prime is 1025564213. The reversal of 1025564166 is 6614655201.

1025564166 is a `hidden beast` number, since 1 + 0 + 2 + 5 + 5 + 641 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1025564166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025564161) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 285975 + ... + 289538.

Almost surely, 2^1025564166 is an apocalyptic number.

1025564166 is an abundant number, since it is smaller than the sum of its proper divisors (1481374818).

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

1025564166 is a wasteful number, since it uses less digits than its factorization.

1025564166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575538 (or 575529 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1025564166 is about 32024.4307677748. The cubic root of 1025564166 is about 1008.4497886367.

The spelling of 1025564166 in words is "one billion, twenty-five million, five hundred sixty-four thousand, one hundred sixty-six".