2120614661 has 6 divisors (see below), whose sum is σ = 2330923686. Its totient is φ = 1927831400.

The previous prime is 2120614627. The next prime is 2120614673. The reversal of 2120614661 is 1664160212.

It can be written as a sum of positive squares in only one way, i.e., 1980784036 + 139830625 = 44506^2 + 11825^2 .

It is not a de Polignac number, because 2120614661 - 2³⁰ = 1046872837 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 (2120614621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8762750 + ... + 8762991.

It is an arithmetic number, because the mean of its divisors is an integer number (388487281).

Almost surely, 2^2120614661 is an apocalyptic number.

It is an amenable number.

2120614661 is a deficient number, since it is larger than the sum of its proper divisors (210309025).

2120614661 is a wasteful number, since it uses less digits than its factorization.

2120614661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17525763 (or 17525752 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2120614661 is about 46050.1320410702. The cubic root of 2120614661 is about 1284.7557986998.

Adding to 2120614661 its reverse (1664160212), we get a palindrome (3784774873).

The spelling of 2120614661 in words is "two billion, one hundred twenty million, six hundred fourteen thousand, six hundred sixty-one".