7666202715065 has 4 divisors (see below), whose sum is σ = 9199443258084. Its totient is φ = 6132962172048.

The previous prime is 7666202715023. The next prime is 7666202715161. The reversal of 7666202715065 is 5605172026667.

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 1199541895696 + 6466660819369 = 1095236^2 + 2542963^2 .

It is a cyclic number.

It is not a de Polignac number, because 7666202715065 - 2²⁸ = 7665934279609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7666202714998 and 7666202715016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766620271502 + ... + 766620271511.

It is an arithmetic number, because the mean of its divisors is an integer number (2299860814521).

Almost surely, 2^{7666202715065} is an apocalyptic number.

It is an amenable number.

7666202715065 is a deficient number, since it is larger than the sum of its proper divisors (1533240543019).

7666202715065 is a wasteful number, since it uses less digits than its factorization.

7666202715065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533240543018.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 7666202715065 in words is "seven trillion, six hundred sixty-six billion, two hundred two million, seven hundred fifteen thousand, sixty-five".