525745665 has 24 divisors (see below), whose sum is σ = 933522408. Its totient is φ = 273557760.

The previous prime is 525745657. The next prime is 525745673. The reversal of 525745665 is 566547525.

525745665 is a `hidden beast` number, since 525 + 74 + 56 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (525745657) and next prime (525745673).

It can be written as a sum of positive squares in 4 ways, for example, as 35034561 + 490711104 = 5919^2 + 22152^2 .

It is not a de Polignac number, because 525745665 - 2³ = 525745657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 525745665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140634 + ... + 144323.

It is an arithmetic number, because the mean of its divisors is an integer number (38896767).

Almost surely, 2^525745665 is an apocalyptic number.

It is an amenable number.

525745665 is a deficient number, since it is larger than the sum of its proper divisors (407776743).

525745665 is a wasteful number, since it uses less digits than its factorization.

525745665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285009 (or 285006 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The square root of 525745665 is about 22929.1444454432. The cubic root of 525745665 is about 807.0960716274.

The spelling of 525745665 in words is "five hundred twenty-five million, seven hundred forty-five thousand, six hundred sixty-five".