83880966721 has 8 divisors (see below), whose sum is σ = 89694500904. Its totient is φ = 78165139200.

The previous prime is 83880966707. The next prime is 83880966733. The reversal of 83880966721 is 12766908838.

It can be written as a sum of positive squares in 4 ways, for example, as 20948220225 + 62932746496 = 144735^2 + 250864^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83880966721 - 2²⁵ = 83847412289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83880960721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24424890 + ... + 24428323.

It is an arithmetic number, because the mean of its divisors is an integer number (11211812613).

Almost surely, 2^83880966721 is an apocalyptic number.

It is an amenable number.

83880966721 is a deficient number, since it is larger than the sum of its proper divisors (5813534183).

83880966721 is a wasteful number, since it uses less digits than its factorization.

83880966721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48853331.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 83880966721 in words is "eighty-three billion, eight hundred eighty million, nine hundred sixty-six thousand, seven hundred twenty-one".