669098525 has 6 divisors (see below), whose sum is σ = 829682202. Its totient is φ = 535278800.

The previous prime is 669098503. The next prime is 669098539. The reversal of 669098525 is 525890966.

669098525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 115390564 + 553707961 = 10742^2 + 23531^2 .

It is a de Polignac number, because none of the positive numbers 2^k-669098525 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 13381946 + ... + 13381995.

It is an arithmetic number, because the mean of its divisors is an integer number (138280367).

Almost surely, 2^669098525 is an apocalyptic number.

It is an amenable number.

669098525 is a deficient number, since it is larger than the sum of its proper divisors (160583677).

669098525 is a wasteful number, since it uses less digits than its factorization.

669098525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26763951 (or 26763946 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 669098525 is about 25866.9388409220. The cubic root of 669098525 is about 874.6413877394.

The spelling of 669098525 in words is "six hundred sixty-nine million, ninety-eight thousand, five hundred twenty-five".