31666673 has 8 divisors (see below), whose sum is σ = 34043520. Its totient is φ = 29360880.

The previous prime is 31666643. The next prime is 31666693. The reversal of 31666673 is 37666613.

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

It is a cyclic number.

It is not a de Polignac number, because 31666673 - 2¹⁶ = 31601137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31666633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16838 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (4255440).

Almost surely, 2^31666673 is an apocalyptic number.

It is an amenable number.

31666673 is a deficient number, since it is larger than the sum of its proper divisors (2376847).

31666673 is a wasteful number, since it uses less digits than its factorization.

31666673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35527.

The product of its digits is 81648, while the sum is 38.

The square root of 31666673 is about 5627.3149014428. The cubic root of 31666673 is about 316.3740196926.

The spelling of 31666673 in words is "thirty-one million, six hundred sixty-six thousand, six hundred seventy-three".