7661245117 has 8 divisors (see below), whose sum is σ = 7861364280. Its totient is φ = 7461757440.

The previous prime is 7661245087. The next prime is 7661245127. The reversal of 7661245117 is 7115421667.

It can be written as a sum of positive squares in 4 ways, for example, as 238733401 + 7422511716 = 15451^2 + 86154^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7661245117 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 7661245117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661245127) 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 7 ways as a sum of consecutive naturals, for example, 133242 + ... + 181867.

It is an arithmetic number, because the mean of its divisors is an integer number (982670535).

Almost surely, 2^7661245117 is an apocalyptic number.

It is an amenable number.

7661245117 is a deficient number, since it is larger than the sum of its proper divisors (200119163).

7661245117 is a wasteful number, since it uses less digits than its factorization.

7661245117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315743.

The product of its digits is 70560, while the sum is 40.

The square root of 7661245117 is about 87528.5388716160. The cubic root of 7661245117 is about 1971.3623253990.

The spelling of 7661245117 in words is "seven billion, six hundred sixty-one million, two hundred forty-five thousand, one hundred seventeen".