66814734675 has 96 divisors (see below), whose sum is σ = 122220052416. Its totient is φ = 31997952000.

The previous prime is 66814734667. The next prime is 66814734691. The reversal of 66814734675 is 57643741866.

It is not a de Polignac number, because 66814734675 - 2³ = 66814734667 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14908435 + ... + 14912915.

It is an arithmetic number, because the mean of its divisors is an integer number (1273125546).

Almost surely, 2^66814734675 is an apocalyptic number.

66814734675 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66814734675 is a deficient number, since it is larger than the sum of its proper divisors (55405317741).

66814734675 is a wasteful number, since it uses less digits than its factorization.

66814734675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921 (or 4916 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 57.

The spelling of 66814734675 in words is "sixty-six billion, eight hundred fourteen million, seven hundred thirty-four thousand, six hundred seventy-five".