66354274434 has 24 divisors (see below), whose sum is σ = 154375251408. Its totient is φ = 18958364040.

The previous prime is 66354274429. The next prime is 66354274447. The reversal of 66354274434 is 43447245366.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112847112 + ... + 112847699.

It is an arithmetic number, because the mean of its divisors is an integer number (6432302142).

Almost surely, 2^66354274434 is an apocalyptic number.

66354274434 is an abundant number, since it is smaller than the sum of its proper divisors (88020976974).

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

66354274434 is a wasteful number, since it uses less digits than its factorization.

66354274434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225694830 (or 225694823 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 48.

The spelling of 66354274434 in words is "sixty-six billion, three hundred fifty-four million, two hundred seventy-four thousand, four hundred thirty-four".