64421676 has 96 divisors (see below), whose sum is σ = 183778560. Its totient is φ = 19353600.

The previous prime is 64421657. The next prime is 64421683. The reversal of 64421676 is 67612446.

64421676 is a `hidden beast` number, since 644 + 2 + 1 + 6 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64421676.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250540 + ... + 250796.

It is an arithmetic number, because the mean of its divisors is an integer number (1914360).

Almost surely, 2^64421676 is an apocalyptic number.

64421676 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64421676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91889280).

64421676 is an abundant number, since it is smaller than the sum of its proper divisors (119356884).

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

64421676 is a wasteful number, since it uses less digits than its factorization.

64421676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 484 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 64421676 is about 8026.3114816209. The cubic root of 64421676 is about 400.8765693290.

It can be divided in two parts, 6442 and 1676, that added together give a palindrome (8118).

The spelling of 64421676 in words is "sixty-four million, four hundred twenty-one thousand, six hundred seventy-six".