1166011265651 has 16 divisors (see below), whose sum is σ = 1192174184448. Its totient is φ = 1139905668000.

The previous prime is 1166011265491. The next prime is 1166011265659. The reversal of 1166011265651 is 1565621106611.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166011265651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166011265599 and 1166011265608.

It is not an unprimeable number, because it can be changed into a prime (1166011265659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217902626 + ... + 217907976.

It is an arithmetic number, because the mean of its divisors is an integer number (74510886528).

Almost surely, 2^{1166011265651} is an apocalyptic number.

1166011265651 is a deficient number, since it is larger than the sum of its proper divisors (26162918797).

1166011265651 is a wasteful number, since it uses less digits than its factorization.

1166011265651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9802.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 1166011265651 in words is "one trillion, one hundred sixty-six billion, eleven million, two hundred sixty-five thousand, six hundred fifty-one".