7661667007517 has 4 divisors (see below), whose sum is σ = 7705954100220. Its totient is φ = 7617379914816.

The previous prime is 7661667007459. The next prime is 7661667007523. The reversal of 7661667007517 is 7157007661667.

It is a happy number.

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 5652953228836 + 2008713778681 = 2377594^2 + 1417291^2 .

It is a cyclic number.

It is not a de Polignac number, because 7661667007517 - 2⁶ = 7661667007453 is a prime.

It is a super-2 number, since 2×7661667007517² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661667007567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22143546092 + ... + 22143546437.

It is an arithmetic number, because the mean of its divisors is an integer number (1926488525055).

Almost surely, 2^{7661667007517} is an apocalyptic number.

It is an amenable number.

7661667007517 is a deficient number, since it is larger than the sum of its proper divisors (44287092703).

7661667007517 is a wasteful number, since it uses less digits than its factorization.

7661667007517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44287092702.

The product of its (nonzero) digits is 15558480, while the sum is 59.

The spelling of 7661667007517 in words is "seven trillion, six hundred sixty-one billion, six hundred sixty-seven million, seven thousand, five hundred seventeen".