6665161110651 has 32 divisors (see below), whose sum is σ = 9880085160000. Its totient is φ = 4440844041984.

The previous prime is 6665161110611. The next prime is 6665161110653. The reversal of 6665161110651 is 1560111615666.

It is a de Polignac number, because none of the positive numbers 2^k-6665161110651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6665161110597 and 6665161110606.

It is not an unprimeable number, because it can be changed into a prime (6665161110653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396043705 + ... + 396060533.

It is an arithmetic number, because the mean of its divisors is an integer number (308752661250).

Almost surely, 2^{6665161110651} is an apocalyptic number.

6665161110651 is a deficient number, since it is larger than the sum of its proper divisors (3214924049349).

6665161110651 is a wasteful number, since it uses less digits than its factorization.

6665161110651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24540 (or 24534 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 6665161110651 in words is "six trillion, six hundred sixty-five billion, one hundred sixty-one million, one hundred ten thousand, six hundred fifty-one".