7400415661 has 4 divisors (see below), whose sum is σ = 7501791292. Its totient is φ = 7299040032.

The previous prime is 7400415647. The next prime is 7400415689. The reversal of 7400415661 is 1665140047.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5625900036 + 1774515625 = 75006^2 + 42125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7400415661 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 (7400415601) 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 3 ways as a sum of consecutive naturals, for example, 50687706 + ... + 50687851.

It is an arithmetic number, because the mean of its divisors is an integer number (1875447823).

Almost surely, 2^7400415661 is an apocalyptic number.

It is an amenable number.

7400415661 is a deficient number, since it is larger than the sum of its proper divisors (101375631).

7400415661 is a wasteful number, since it uses less digits than its factorization.

7400415661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101375630.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 7400415661 is about 86025.6686169890. The cubic root of 7400415661 is about 1948.7316460239.

The spelling of 7400415661 in words is "seven billion, four hundred million, four hundred fifteen thousand, six hundred sixty-one".