83966664442 has 8 divisors (see below), whose sum is σ = 125991152532. Its totient is φ = 41969613600.

The previous prime is 83966664437. The next prime is 83966664521. The reversal of 83966664442 is 24446666938.

It can be written as a sum of positive squares in 2 ways, for example, as 72285161881 + 11681502561 = 268859^2 + 108081^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6851659 + ... + 6863902.

Almost surely, 2^83966664442 is an apocalyptic number.

83966664442 is a deficient number, since it is larger than the sum of its proper divisors (42024488090).

83966664442 is a wasteful number, since it uses less digits than its factorization.

83966664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13718624.

The product of its digits is 35831808, while the sum is 58.

The spelling of 83966664442 in words is "eighty-three billion, nine hundred sixty-six million, six hundred sixty-four thousand, four hundred forty-two".