6421400662 has 16 divisors (see below), whose sum is σ = 9866806272. Its totient is φ = 3132878760.

The previous prime is 6421400651. The next prime is 6421400669. The reversal of 6421400662 is 2660041246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421400669) 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, 72078 + ... + 134305.

It is an arithmetic number, because the mean of its divisors is an integer number (616675392).

Almost surely, 2^6421400662 is an apocalyptic number.

6421400662 is a deficient number, since it is larger than the sum of its proper divisors (3445405610).

6421400662 is a wasteful number, since it uses less digits than its factorization.

6421400662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206763.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6421400662 is about 80133.6425104962. The cubic root of 6421400662 is about 1858.7026701239.

The spelling of 6421400662 in words is "six billion, four hundred twenty-one million, four hundred thousand, six hundred sixty-two".