1156666566065 has 8 divisors (see below), whose sum is σ = 1388050540800. Its totient is φ = 925299478512.

The previous prime is 1156666566059. The next prime is 1156666566131. The reversal of 1156666566065 is 5606656666511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156666566065 - 2¹⁸ = 1156666303921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156666565995 and 1156666566013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4070615 + ... + 4345484.

It is an arithmetic number, because the mean of its divisors is an integer number (173506317600).

Almost surely, 2^{1156666566065} is an apocalyptic number.

It is an amenable number.

1156666566065 is a deficient number, since it is larger than the sum of its proper divisors (231383974735).

1156666566065 is an equidigital number, since it uses as much as digits as its factorization.

1156666566065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8443591.

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 1156666566065 in words is "one trillion, one hundred fifty-six billion, six hundred sixty-six million, five hundred sixty-six thousand, sixty-five".