165650061160661 has 16 divisors (see below), whose sum is σ = 206615293116288. Its totient is φ = 129021381273600.

The previous prime is 165650061160583. The next prime is 165650061160687. The reversal of 165650061160661 is 166061160056561.

It is a cyclic number.

It is not a de Polignac number, because 165650061160661 - 2¹⁰ = 165650061159637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165650061160361) 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, 471393740 + ... + 471745013.

It is an arithmetic number, because the mean of its divisors is an integer number (12913455819768).

Almost surely, 2^{165650061160661} is an apocalyptic number.

165650061160661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165650061160661 is a deficient number, since it is larger than the sum of its proper divisors (40965231955627).

165650061160661 is a wasteful number, since it uses less digits than its factorization.

165650061160661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943141052.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 165650061160661 in words is "one hundred sixty-five trillion, six hundred fifty billion, sixty-one million, one hundred sixty thousand, six hundred sixty-one".