7665969957911 has 4 divisors (see below), whose sum is σ = 7913259311424. Its totient is φ = 7418680604400.

The previous prime is 7665969957907. The next prime is 7665969957923. The reversal of 7665969957911 is 1197599695667.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7665969957911 - 2² = 7665969957907 is a prime.

It is a super-2 number, since 2×7665969957911² (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 (7665969957211) 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, 123644676710 + ... + 123644676771.

It is an arithmetic number, because the mean of its divisors is an integer number (1978314827856).

Almost surely, 2^{7665969957911} is an apocalyptic number.

7665969957911 is a deficient number, since it is larger than the sum of its proper divisors (247289353513).

7665969957911 is a wasteful number, since it uses less digits than its factorization.

7665969957911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247289353512.

The product of its digits is 1736040600, while the sum is 80.

The spelling of 7665969957911 in words is "seven trillion, six hundred sixty-five billion, nine hundred sixty-nine million, nine hundred fifty-seven thousand, nine hundred eleven".