66829946434 has 8 divisors (see below), whose sum is σ = 100248332940. Its totient is φ = 33413835456.

The previous prime is 66829946411. The next prime is 66829946437. The reversal of 66829946434 is 43464992866.

It can be written as a sum of positive squares in 2 ways, for example, as 66772110409 + 57836025 = 258403^2 + 7605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66829946437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493459 + ... + 614134.

Almost surely, 2^66829946434 is an apocalyptic number.

66829946434 is a deficient number, since it is larger than the sum of its proper divisors (33418386506).

66829946434 is a wasteful number, since it uses less digits than its factorization.

66829946434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137764.

The product of its digits is 53747712, while the sum is 61.

The spelling of 66829946434 in words is "sixty-six billion, eight hundred twenty-nine million, nine hundred forty-six thousand, four hundred thirty-four".