2116658740 has 24 divisors (see below), whose sum is σ = 5079981312. Its totient is φ = 725711520.

The previous prime is 2116658723. The next prime is 2116658749. The reversal of 2116658740 is 478566112.

It is a junction number, because it is equal to n+sod(n) for n = 2116658693 and 2116658702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116658749) 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, 7559356 + ... + 7559635.

It is an arithmetic number, because the mean of its divisors is an integer number (211665888).

Almost surely, 2^2116658740 is an apocalyptic number.

2116658740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116658740 is an abundant number, since it is smaller than the sum of its proper divisors (2963322572).

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

2116658740 is a wasteful number, since it uses less digits than its factorization.

2116658740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15119007 (or 15119005 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2116658740 is about 46007.1596602094. The cubic root of 2116658740 is about 1283.9564147367.

The spelling of 2116658740 in words is "two billion, one hundred sixteen million, six hundred fifty-eight thousand, seven hundred forty".