66783123674 has 16 divisors (see below), whose sum is σ = 105465326400. Its totient is φ = 31628624544.

The previous prime is 66783123577. The next prime is 66783123691. The reversal of 66783123674 is 47632138766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73934 + ... + 372870.

It is an arithmetic number, because the mean of its divisors is an integer number (6591582900).

Almost surely, 2^66783123674 is an apocalyptic number.

66783123674 is a deficient number, since it is larger than the sum of its proper divisors (38682202726).

66783123674 is a wasteful number, since it uses less digits than its factorization.

66783123674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304837.

The product of its digits is 6096384, while the sum is 53.

The spelling of 66783123674 in words is "sixty-six billion, seven hundred eighty-three million, one hundred twenty-three thousand, six hundred seventy-four".