7421668 has 12 divisors (see below), whose sum is σ = 13007932. Its totient is φ = 3705120.

The previous prime is 7421641. The next prime is 7421677. The reversal of 7421668 is 8661247.

It can be written as a sum of positive squares in 2 ways, for example, as 2439844 + 4981824 = 1562^2 + 2232^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3058 + ... + 4918.

Almost surely, 2^7421668 is an apocalyptic number.

It is an amenable number.

7421668 is a deficient number, since it is larger than the sum of its proper divisors (5586264).

7421668 is a wasteful number, since it uses less digits than its factorization.

7421668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862 (or 2860 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 7421668 is about 2724.2738482025. The cubic root of 7421668 is about 195.0595303671.

The spelling of 7421668 in words is "seven million, four hundred twenty-one thousand, six hundred sixty-eight".