66940740474 has 24 divisors (see below), whose sum is σ = 137597711328. Its totient is φ = 21710507760.

The previous prime is 66940740469. The next prime is 66940740481. The reversal of 66940740474 is 47404704966.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 4066582 + ... + 4083009.

It is an arithmetic number, because the mean of its divisors is an integer number (5733237972).

Almost surely, 2^66940740474 is an apocalyptic number.

66940740474 is an abundant number, since it is smaller than the sum of its proper divisors (70656970854).

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

66940740474 is a wasteful number, since it uses less digits than its factorization.

66940740474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8149670 (or 8149633 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 66940740474 in words is "sixty-six billion, nine hundred forty million, seven hundred forty thousand, four hundred seventy-four".