65792778 has 16 divisors (see below), whose sum is σ = 132057216. Its totient is φ = 21852320.

The previous prime is 65792777. The next prime is 65792807. The reversal of 65792778 is 87729756.

It is a self number, because there is not a number n which added to its sum of digits gives 65792778.

It is not an unprimeable number, because it can be changed into a prime (65792777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17826 + ... + 21197.

It is an arithmetic number, because the mean of its divisors is an integer number (8253576).

Almost surely, 2^65792778 is an apocalyptic number.

65792778 is an abundant number, since it is smaller than the sum of its proper divisors (66264438).

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

65792778 is a wasteful number, since it uses less digits than its factorization.

65792778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39309.

The product of its digits is 1481760, while the sum is 51.

The square root of 65792778 is about 8111.2747456858. The cubic root of 65792778 is about 403.7006122595.

The spelling of 65792778 in words is "sixty-five million, seven hundred ninety-two thousand, seven hundred seventy-eight".