66797696 has 32 divisors (see below), whose sum is σ = 152086080. Its totient is φ = 28627200.

The previous prime is 66797693. The next prime is 66797713. The reversal of 66797696 is 69679766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (66797693) 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 3 ways as a sum of consecutive naturals, for example, 36380 + ... + 38171.

It is an arithmetic number, because the mean of its divisors is an integer number (4752690).

Almost surely, 2^66797696 is an apocalyptic number.

It is an amenable number.

66797696 is an abundant number, since it is smaller than the sum of its proper divisors (85288384).

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

66797696 is an equidigital number, since it uses as much as digits as its factorization.

66797696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74572 (or 74560 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 56.

The square root of 66797696 is about 8172.9857457358. The cubic root of 66797696 is about 405.7456081465.

The spelling of 66797696 in words is "sixty-six million, seven hundred ninety-seven thousand, six hundred ninety-six".