1165033506661 has 8 divisors (see below), whose sum is σ = 1165722720800. Its totient is φ = 1164344464080.

The previous prime is 1165033506653. The next prime is 1165033506709. The reversal of 1165033506661 is 1666053305611.

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 1165033506661 - 2³ = 1165033506653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165033506361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15086095 + ... + 15163123.

It is an arithmetic number, because the mean of its divisors is an integer number (145715340100).

Almost surely, 2^{1165033506661} is an apocalyptic number.

It is an amenable number.

1165033506661 is a deficient number, since it is larger than the sum of its proper divisors (689214139).

1165033506661 is an equidigital number, since it uses as much as digits as its factorization.

1165033506661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85779.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 1165033506661 in words is "one trillion, one hundred sixty-five billion, thirty-three million, five hundred six thousand, six hundred sixty-one".