3121666697 has 8 divisors (see below), whose sum is σ = 3286220544. Its totient is φ = 2959515328.

The previous prime is 3121666687. The next prime is 3121666699. The reversal of 3121666697 is 7966661213.

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 3121666697 - 2⁸ = 3121666441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121666699) 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, 597953 + ... + 603150.

It is an arithmetic number, because the mean of its divisors is an integer number (410777568).

Almost surely, 2^3121666697 is an apocalyptic number.

It is an amenable number.

3121666697 is a deficient number, since it is larger than the sum of its proper divisors (164553847).

3121666697 is a wasteful number, since it uses less digits than its factorization.

3121666697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201239.

The product of its digits is 489888, while the sum is 47.

The square root of 3121666697 is about 55871.8775145421. The cubic root of 3121666697 is about 1461.4888635281.

The spelling of 3121666697 in words is "three billion, one hundred twenty-one million, six hundred sixty-six thousand, six hundred ninety-seven".