65166525 has 72 divisors (see below), whose sum is σ = 128366784. Its totient is φ = 32659200.

The previous prime is 65166511. The next prime is 65166553. The reversal of 65166525 is 52566156.

It is a happy number.

It is not a de Polignac number, because 65166525 - 2²¹ = 63069373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65166525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 102960 + ... + 103590.

It is an arithmetic number, because the mean of its divisors is an integer number (1782872).

Almost surely, 2^65166525 is an apocalyptic number.

It is an amenable number.

65166525 is a deficient number, since it is larger than the sum of its proper divisors (63200259).

65166525 is a wasteful number, since it uses less digits than its factorization.

65166525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 656 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 65166525 is about 8072.5785843186. The cubic root of 65166525 is about 402.4156427254.

It can be divided in two parts, 6516 and 6525, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 65166525 in words is "sixty-five million, one hundred sixty-six thousand, five hundred twenty-five".