7661236117 has 4 divisors (see below), whose sum is σ = 7676968096. Its totient is φ = 7645504140.

The previous prime is 7661236109. The next prime is 7661236171. The reversal of 7661236117 is 7116321667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7661236117 - 2³ = 7661236109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7661236117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661231117) 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, 7865259 + ... + 7866232.

It is an arithmetic number, because the mean of its divisors is an integer number (1919242024).

Almost surely, 2^7661236117 is an apocalyptic number.

It is an amenable number.

7661236117 is a deficient number, since it is larger than the sum of its proper divisors (15731979).

7661236117 is a wasteful number, since it uses less digits than its factorization.

7661236117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15731978.

The product of its digits is 63504, while the sum is 40.

The square root of 7661236117 is about 87528.4874597979. The cubic root of 7661236117 is about 1971.3615534501.

The spelling of 7661236117 in words is "seven billion, six hundred sixty-one million, two hundred thirty-six thousand, one hundred seventeen".