65662216704 has 160 divisors (see below), whose sum is σ = 222131437440. Its totient is φ = 18760605696.

The previous prime is 65662216703. The next prime is 65662216709. The reversal of 65662216704 is 40761226656.

65662216704 is a `hidden beast` number, since 6 + 5 + 6 + 622 + 16 + 7 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 65662216704.

It is not an unprimeable number, because it can be changed into a prime (65662216703) 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, 242509 + ... + 436044.

It is an arithmetic number, because the mean of its divisors is an integer number (1388321484).

Almost surely, 2^65662216704 is an apocalyptic number.

65662216704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65662216704 is an abundant number, since it is smaller than the sum of its proper divisors (156469220736).

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

65662216704 is an equidigital number, since it uses as much as digits as its factorization.

65662216704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678587 (or 678565 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 65662216704 in words is "sixty-five billion, six hundred sixty-two million, two hundred sixteen thousand, seven hundred four".