66876680801 has 4 divisors (see below), whose sum is σ = 76430492352. Its totient is φ = 57322869252.

The previous prime is 66876680797. The next prime is 66876680831. The reversal of 66876680801 is 10808667866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10808667866 = 2 ⋅5404333933.

It is a cyclic number.

It is not a de Polignac number, because 66876680801 - 2² = 66876680797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66876680831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776905765 + ... + 4776905778.

It is an arithmetic number, because the mean of its divisors is an integer number (19107623088).

Almost surely, 2^66876680801 is an apocalyptic number.

It is an amenable number.

66876680801 is a deficient number, since it is larger than the sum of its proper divisors (9553811551).

66876680801 is an equidigital number, since it uses as much as digits as its factorization.

66876680801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553811550.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 66876680801 in words is "sixty-six billion, eight hundred seventy-six million, six hundred eighty thousand, eight hundred one".