10001665191 has 32 divisors (see below), whose sum is σ = 15998976000. Its totient is φ = 5437110240.

The previous prime is 10001665187. The next prime is 10001665213. The reversal of 10001665191 is 19156610001.

It is not a de Polignac number, because 10001665191 - 2² = 10001665187 is a prime.

It is a super-2 number, since 2×10001665191² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001665111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91791 + ... + 168608.

It is an arithmetic number, because the mean of its divisors is an integer number (499968000).

Almost surely, 2^10001665191 is an apocalyptic number.

10001665191 is a deficient number, since it is larger than the sum of its proper divisors (5997310809).

10001665191 is a wasteful number, since it uses less digits than its factorization.

10001665191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260499.

The product of its (nonzero) digits is 1620, while the sum is 30.

The spelling of 10001665191 in words is "ten billion, one million, six hundred sixty-five thousand, one hundred ninety-one".