65425861 has 4 divisors (see below), whose sum is σ = 66347424. Its totient is φ = 64504300.

The previous prime is 65425859. The next prime is 65425883. The reversal of 65425861 is 16852456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65425861 - 2¹ = 65425859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65425861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65425831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460675 + ... + 460816.

It is an arithmetic number, because the mean of its divisors is an integer number (16586856).

Almost surely, 2^65425861 is an apocalyptic number.

It is an amenable number.

65425861 is a deficient number, since it is larger than the sum of its proper divisors (921563).

65425861 is an equidigital number, since it uses as much as digits as its factorization.

65425861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921562.

The product of its digits is 57600, while the sum is 37.

The square root of 65425861 is about 8088.6254085598. The cubic root of 65425861 is about 402.9487524807.

It can be divided in two parts, 6542 and 5861, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 65425861 in words is "sixty-five million, four hundred twenty-five thousand, eight hundred sixty-one".