420664506 has 16 divisors (see below), whose sum is σ = 843091200. Its totient is φ = 139927808.

The previous prime is 420664487. The next prime is 420664511. The reversal of 420664506 is 605466024.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70311 + ... + 76058.

It is an arithmetic number, because the mean of its divisors is an integer number (52693200).

Almost surely, 2^420664506 is an apocalyptic number.

420664506 is an abundant number, since it is smaller than the sum of its proper divisors (422426694).

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

420664506 is a wasteful number, since it uses less digits than its factorization.

420664506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146853.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 420664506 is about 20510.1074107378. The cubic root of 420664506 is about 749.2819830438.

The spelling of 420664506 in words is "four hundred twenty million, six hundred sixty-four thousand, five hundred six".