702166221 has 12 divisors (see below), whose sum is σ = 1037827648. Its totient is φ = 457224264.

The previous prime is 702166217. The next prime is 702166247. The reversal of 702166221 is 122661207.

It is not a de Polignac number, because 702166221 - 2² = 702166217 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 (702166271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 906805 + ... + 907578.

Almost surely, 2^702166221 is an apocalyptic number.

It is an amenable number.

702166221 is a deficient number, since it is larger than the sum of its proper divisors (335661427).

702166221 is a wasteful number, since it uses less digits than its factorization.

702166221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814432 (or 1814429 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 702166221 is about 26498.4192170024. The cubic root of 702166221 is about 888.8189615761.

The spelling of 702166221 in words is "seven hundred two million, one hundred sixty-six thousand, two hundred twenty-one".