31666241037437 has 4 divisors (see below), whose sum is σ = 31666566721440. Its totient is φ = 31665915353436.

The previous prime is 31666241037427. The next prime is 31666241037481. The reversal of 31666241037437 is 73473014266613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31666241037437 - 2²⁰ = 31666239988861 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 (31666241037407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162696113 + ... + 162890630.

It is an arithmetic number, because the mean of its divisors is an integer number (7916641680360).

Almost surely, 2^{31666241037437} is an apocalyptic number.

It is an amenable number.

31666241037437 is a deficient number, since it is larger than the sum of its proper divisors (325684003).

31666241037437 is an equidigital number, since it uses as much as digits as its factorization.

31666241037437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325684002.

The product of its (nonzero) digits is 9144576, while the sum is 53.

The spelling of 31666241037437 in words is "thirty-one trillion, six hundred sixty-six billion, two hundred forty-one million, thirty-seven thousand, four hundred thirty-seven".