2116660572 has 120 divisors (see below), whose sum is σ = 6272882000. Its totient is φ = 616978944.

The previous prime is 2116660519. The next prime is 2116660597. The reversal of 2116660572 is 2750666112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 66804 + ... + 93252.

Almost surely, 2^2116660572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2116660572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3136441000).

2116660572 is an abundant number, since it is smaller than the sum of its proper divisors (4156221428).

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

2116660572 is a wasteful number, since it uses less digits than its factorization.

2116660572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26497 (or 26486 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 2116660572 is about 46007.1795701497. The cubic root of 2116660572 is about 1283.9567851645.

The spelling of 2116660572 in words is "two billion, one hundred sixteen million, six hundred sixty thousand, five hundred seventy-two".