4000421668 has 12 divisors (see below), whose sum is σ = 7051103920. Its totient is φ = 1985820552.

The previous prime is 4000421653. The next prime is 4000421683. The reversal of 4000421668 is 8661240004.

It is an interprime number because it is at equal distance from previous prime (4000421653) and next prime (4000421683).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3596946 + ... + 3598057.

Almost surely, 2^4000421668 is an apocalyptic number.

It is an amenable number.

4000421668 is a deficient number, since it is larger than the sum of its proper divisors (3050682252).

4000421668 is a wasteful number, since it uses less digits than its factorization.

4000421668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195146 (or 7195144 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 4000421668 is about 63248.8866937593. The cubic root of 4000421668 is about 1587.4568296938.

The spelling of 4000421668 in words is "four billion, four hundred twenty-one thousand, six hundred sixty-eight".