420664430556 has 72 divisors (see below), whose sum is σ = 1076304491808. Its totient is φ = 138522960000.

The previous prime is 420664430539. The next prime is 420664430603. The reversal of 420664430556 is 655034466024.

It is a happy number.

420664430556 is a `hidden beast` number, since 4 + 2 + 0 + 6 + 64 + 4 + 30 + 556 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 770146 + ... + 1197686.

Almost surely, 2^420664430556 is an apocalyptic number.

It is an amenable number.

420664430556 is an abundant number, since it is smaller than the sum of its proper divisors (655640061252).

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

420664430556 is a wasteful number, since it uses less digits than its factorization.

420664430556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427883 (or 427878 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 420664430556 in words is "four hundred twenty billion, six hundred sixty-four million, four hundred thirty thousand, five hundred fifty-six".