66344159476 has 24 divisors (see below), whose sum is σ = 132769964096. Its totient is φ = 28415715840.

The previous prime is 66344159449. The next prime is 66344159513. The reversal of 66344159476 is 67495144366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682605 + ... + 773716.

Almost surely, 2^66344159476 is an apocalyptic number.

It is an amenable number.

66344159476 is an abundant number, since it is smaller than the sum of its proper divisors (66425804620).

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

66344159476 is a wasteful number, since it uses less digits than its factorization.

66344159476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457959 (or 1457957 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 55.

The spelling of 66344159476 in words is "sixty-six billion, three hundred forty-four million, one hundred fifty-nine thousand, four hundred seventy-six".