65812992 has 80 divisors (see below), whose sum is σ = 200409792. Its totient is φ = 18800640.

The previous prime is 65812991. The next prime is 65812993. The reversal of 65812992 is 29921856.

It is an interprime number because it is at equal distance from previous prime (65812991) and next prime (65812993).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (65812991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7692 + ... + 13812.

Almost surely, 2^65812992 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 65812992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100204896).

65812992 is an abundant number, since it is smaller than the sum of its proper divisors (134596800).

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

65812992 is an equidigital number, since it uses as much as digits as its factorization.

65812992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149 (or 6133 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 65812992 is about 8112.5206933480. The cubic root of 65812992 is about 403.7419519973.

The spelling of 65812992 in words is "sixty-five million, eight hundred twelve thousand, nine hundred ninety-two".