966721885 has 8 divisors (see below), whose sum is σ = 1172026296. Its totient is φ = 765404160.

The previous prime is 966721883. The next prime is 966721909. The reversal of 966721885 is 588127669.

It can be written as a sum of positive squares in 4 ways, for example, as 158684409 + 808037476 = 12597^2 + 28426^2 .

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

It is not a de Polignac number, because 966721885 - 2¹ = 966721883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966721883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996136 + ... + 997105.

It is an arithmetic number, because the mean of its divisors is an integer number (146503287).

Almost surely, 2^966721885 is an apocalyptic number.

It is an amenable number.

966721885 is a deficient number, since it is larger than the sum of its proper divisors (205304411).

966721885 is a wasteful number, since it uses less digits than its factorization.

966721885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993343.

The product of its digits is 1451520, while the sum is 52.

The square root of 966721885 is about 31092.1515016250. The cubic root of 966721885 is about 988.7819202680.

The spelling of 966721885 in words is "nine hundred sixty-six million, seven hundred twenty-one thousand, eight hundred eighty-five".