66198910830479 has 4 divisors (see below), whose sum is σ = 75655898091984. Its totient is φ = 56741923568976.

The previous prime is 66198910830469. The next prime is 66198910830529. The reversal of 66198910830479 is 97403801989166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66198910830479 - 2²⁰ = 66198909781903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66198910830469) 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, 4728493630742 + ... + 4728493630755.

It is an arithmetic number, because the mean of its divisors is an integer number (18913974522996).

Almost surely, 2^{66198910830479} is an apocalyptic number.

66198910830479 is a deficient number, since it is larger than the sum of its proper divisors (9456987261505).

66198910830479 is an equidigital number, since it uses as much as digits as its factorization.

66198910830479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9456987261504.

The product of its (nonzero) digits is 141087744, while the sum is 71.

The spelling of 66198910830479 in words is "sixty-six trillion, one hundred ninety-eight billion, nine hundred ten million, eight hundred thirty thousand, four hundred seventy-nine".