65999416 has 64 divisors (see below), whose sum is σ = 148236480. Its totient is φ = 26956800.

The previous prime is 65999411. The next prime is 65999429. The reversal of 65999416 is 61499956.

It is a self number, because there is not a number n which added to its sum of digits gives 65999416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65999411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109516 + ... + 110116.

It is an arithmetic number, because the mean of its divisors is an integer number (2316195).

Almost surely, 2^65999416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65999416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74118240).

65999416 is an abundant number, since it is smaller than the sum of its proper divisors (82237064).

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

65999416 is a wasteful number, since it uses less digits than its factorization.

65999416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 700 counting only the distinct ones).

The product of its digits is 524880, while the sum is 49.

The square root of 65999416 is about 8124.0024618411. The cubic root of 65999416 is about 404.1228100970.

The spelling of 65999416 in words is "sixty-five million, nine hundred ninety-nine thousand, four hundred sixteen".