65998394 has 24 divisors (see below), whose sum is σ = 125631648. Its totient is φ = 25713240.

The previous prime is 65998393. The next prime is 65998423. The reversal of 65998394 is 49389956.

It is not an unprimeable number, because it can be changed into a prime (65998393) 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, 29534 + ... + 31689.

It is an arithmetic number, because the mean of its divisors is an integer number (5234652).

Almost surely, 2^65998394 is an apocalyptic number.

65998394 is a deficient number, since it is larger than the sum of its proper divisors (59633254).

65998394 is a wasteful number, since it uses less digits than its factorization.

65998394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61250 (or 61243 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 65998394 is about 8123.9395615674. The cubic root of 65998394 is about 404.1207241409.

The spelling of 65998394 in words is "sixty-five million, nine hundred ninety-eight thousand, three hundred ninety-four".