66879437527 has 4 divisors (see below), whose sum is σ = 76433642896. Its totient is φ = 57325232160.

The previous prime is 66879437473. The next prime is 66879437531. The reversal of 66879437527 is 72573497866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72573497866 = 2 ⋅36286748933.

It is not a de Polignac number, because 66879437527 - 2³⁵ = 32519699159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66879437557) 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, 4777102674 + ... + 4777102687.

It is an arithmetic number, because the mean of its divisors is an integer number (19108410724).

Almost surely, 2^66879437527 is an apocalyptic number.

66879437527 is a deficient number, since it is larger than the sum of its proper divisors (9554205369).

66879437527 is an equidigital number, since it uses as much as digits as its factorization.

66879437527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554205368.

The product of its digits is 106686720, while the sum is 64.

The spelling of 66879437527 in words is "sixty-six billion, eight hundred seventy-nine million, four hundred thirty-seven thousand, five hundred twenty-seven".