17965666041 has 16 divisors (see below), whose sum is σ = 24526022400. Its totient is φ = 11691545040.

The previous prime is 17965666021. The next prime is 17965666051. The reversal of 17965666041 is 14066656971.

It is not a de Polignac number, because 17965666041 - 2⁵ = 17965666009 is a prime.

It is a super-2 number, since 2×17965666041² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17965666021) 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, 178186 + ... + 260156.

It is an arithmetic number, because the mean of its divisors is an integer number (1532876400).

Almost surely, 2^17965666041 is an apocalyptic number.

It is an amenable number.

17965666041 is a deficient number, since it is larger than the sum of its proper divisors (6560356359).

17965666041 is a wasteful number, since it uses less digits than its factorization.

17965666041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83716.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 17965666041 in words is "seventeen billion, nine hundred sixty-five million, six hundred sixty-six thousand, forty-one".