65999422 has 24 divisors (see below), whose sum is σ = 103338648. Its totient is φ = 31606080.

The previous prime is 65999411. The next prime is 65999429. The reversal of 65999422 is 22499956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65999429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225108 + ... + 225400.

It is an arithmetic number, because the mean of its divisors is an integer number (4305777).

Almost surely, 2^65999422 is an apocalyptic number.

65999422 is a deficient number, since it is larger than the sum of its proper divisors (37339226).

65999422 is a wasteful number, since it uses less digits than its factorization.

65999422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 403 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The square root of 65999422 is about 8124.0028311172. The cubic root of 65999422 is about 404.1228223433.

Subtracting from 65999422 its sum of digits (46), we obtain a square (65999376 = 8124²).

The spelling of 65999422 in words is "sixty-five million, nine hundred ninety-nine thousand, four hundred twenty-two".