65909025 has 192 divisors, whose sum is σ = 158323200. Its totient is φ = 26127360.

The previous prime is 65909009. The next prime is 65909027. The reversal of 65909025 is 52090956.

It is not a de Polignac number, because 65909025 - 2⁴ = 65909009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65909027) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1781307 + ... + 1781343.

It is an arithmetic number, because the mean of its divisors is an integer number (824600).

Almost surely, 2^65909025 is an apocalyptic number.

65909025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65909025 is an abundant number, since it is smaller than the sum of its proper divisors (92414175).

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

65909025 is a wasteful number, since it uses less digits than its factorization.

65909025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 65909025 is about 8118.4373496382. The cubic root of 65909025 is about 403.9382339485.

The spelling of 65909025 in words is "sixty-five million, nine hundred nine thousand, twenty-five".