420669435606 has 128 divisors (see below), whose sum is σ = 1036049771520. Its totient is φ = 111128371200.

The previous prime is 420669435587. The next prime is 420669435607. The reversal of 420669435606 is 606534966024.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420669435607) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91031976 + ... + 91036596.

It is an arithmetic number, because the mean of its divisors is an integer number (8094138840).

Almost surely, 2^420669435606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420669435606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518024885760).

420669435606 is an abundant number, since it is smaller than the sum of its proper divisors (615380335914).

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

420669435606 is a wasteful number, since it uses less digits than its factorization.

420669435606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6870.

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 420669435606 in words is "four hundred twenty billion, six hundred sixty-nine million, four hundred thirty-five thousand, six hundred six".