7021668 has 24 divisors (see below), whose sum is σ = 16492672. Its totient is φ = 2325024.

The previous prime is 7021657. The next prime is 7021691. The reversal of 7021668 is 8661207.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 3747.

Almost surely, 2^7021668 is an apocalyptic number.

It is an amenable number.

7021668 is an abundant number, since it is smaller than the sum of its proper divisors (9471004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7021668 is a wasteful number, since it uses less digits than its factorization.

7021668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891 (or 3889 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 7021668 is about 2649.8430142180. The cubic root of 7021668 is about 191.4902930315.

The spelling of 7021668 in words is "seven million, twenty-one thousand, six hundred sixty-eight".