7661717065 has 16 divisors (see below), whose sum is σ = 9234864576. Its totient is φ = 6102216000.

The previous prime is 7661716987. The next prime is 7661717071. The reversal of 7661717065 is 5607171667.

It is not a de Polignac number, because 7661717065 - 2¹⁵ = 7661684297 is a prime.

It is a super-2 number, since 2×7661717065² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1889290 + ... + 1893340.

It is an arithmetic number, because the mean of its divisors is an integer number (577179036).

Almost surely, 2^7661717065 is an apocalyptic number.

It is an amenable number.

7661717065 is a deficient number, since it is larger than the sum of its proper divisors (1573147511).

7661717065 is a wasteful number, since it uses less digits than its factorization.

7661717065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 7661717065 is about 87531.2347964999. The cubic root of 7661717065 is about 1971.4028045199.

The spelling of 7661717065 in words is "seven billion, six hundred sixty-one million, seven hundred seventeen thousand, sixty-five".