66409144074 has 96 divisors (see below), whose sum is σ = 182803805184. Its totient is φ = 16949502720.

The previous prime is 66409144069. The next prime is 66409144099. The reversal of 66409144074 is 47044190466.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 603139 + ... + 704694.

It is an arithmetic number, because the mean of its divisors is an integer number (1904206304).

Almost surely, 2^66409144074 is an apocalyptic number.

66409144074 is an abundant number, since it is smaller than the sum of its proper divisors (116394661110).

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

66409144074 is a wasteful number, since it uses less digits than its factorization.

66409144074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307892 (or 1307889 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 66409144074 in words is "sixty-six billion, four hundred nine million, one hundred forty-four thousand, seventy-four".