7409408661 has 10 divisors (see below), whose sum is σ = 11068376022. Its totient is φ = 4939605720.

The previous prime is 7409408653. The next prime is 7409408681. The reversal of 7409408661 is 1668049047.

It can be written as a sum of positive squares in only one way, i.e., 6597500625 + 811908036 = 81225^2 + 28494^2 .

It is not a de Polignac number, because 7409408661 - 2³ = 7409408653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7409408641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 45737010 + ... + 45737171.

Almost surely, 2^7409408661 is an apocalyptic number.

It is an amenable number.

7409408661 is a deficient number, since it is larger than the sum of its proper divisors (3658967361).

7409408661 is an equidigital number, since it uses as much as digits as its factorization.

7409408661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91474193 (or 91474184 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 7409408661 is about 86077.9220299840. The cubic root of 7409408661 is about 1949.5206940316.

The spelling of 7409408661 in words is "seven billion, four hundred nine million, four hundred eight thousand, six hundred sixty-one".