31315166661 has 8 divisors (see below), whose sum is σ = 41858729824. Its totient is φ = 20824190640.

The previous prime is 31315166651. The next prime is 31315166699. The reversal of 31315166661 is 16666151313.

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

It is not a de Polignac number, because 31315166661 - 2¹¹ = 31315164613 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 (31315166651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13145395 + ... + 13147776.

It is an arithmetic number, because the mean of its divisors is an integer number (5232341228).

Almost surely, 2^31315166661 is an apocalyptic number.

It is an amenable number.

31315166661 is a deficient number, since it is larger than the sum of its proper divisors (10543563163).

31315166661 is a wasteful number, since it uses less digits than its factorization.

31315166661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26293571.

The product of its digits is 58320, while the sum is 39.

The spelling of 31315166661 in words is "thirty-one billion, three hundred fifteen million, one hundred sixty-six thousand, six hundred sixty-one".