65199400 has 72 divisors (see below), whose sum is σ = 176364270. Its totient is φ = 22350720.

The previous prime is 65199397. The next prime is 65199401. The reversal of 65199400 is 499156.

It can be written as a sum of positive squares in 3 ways, for example, as 28451556 + 36747844 = 5334^2 + 6062^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (65199401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6474 + ... + 13126.

Almost surely, 2^65199400 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 65199400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88182135).

65199400 is an abundant number, since it is smaller than the sum of its proper divisors (111164870).

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

65199400 is a wasteful number, since it uses less digits than its factorization.

65199400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683 (or 6667 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 65199400 is about 8074.6145418837. The cubic root of 65199400 is about 402.4833011346.

The spelling of 65199400 in words is "sixty-five million, one hundred ninety-nine thousand, four hundred".