65992920 has 128 divisors (see below), whose sum is σ = 227888640. Its totient is φ = 14976000.

The previous prime is 65992859. The next prime is 65992937. The reversal of 65992920 is 2929956.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210684 + ... + 210996.

It is an arithmetic number, because the mean of its divisors is an integer number (1780380).

Almost surely, 2^65992920 is an apocalyptic number.

65992920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65992920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113944320).

65992920 is an abundant number, since it is smaller than the sum of its proper divisors (161895720).

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

65992920 is a wasteful number, since it uses less digits than its factorization.

65992920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 65992920 is about 8123.6026490714. The cubic root of 65992920 is about 404.1095510509.

The spelling of 65992920 in words is "sixty-five million, nine hundred ninety-two thousand, nine hundred twenty".