424346436666 has 72 divisors (see below), whose sum is σ = 975758596020. Its totient is φ = 132820224768.

The previous prime is 424346436623. The next prime is 424346436667. The reversal of 424346436666 is 666634643424.

It can be written as a sum of positive squares in 2 ways, for example, as 417167433225 + 7179003441 = 645885^2 + 84729^2 .

It is a super-2 number, since 2×424346436666² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (424346436667) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65593680 + ... + 65600148.

Almost surely, 2^424346436666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424346436666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487879298010).

424346436666 is an abundant number, since it is smaller than the sum of its proper divisors (551412159354).

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

424346436666 is a wasteful number, since it uses less digits than its factorization.

424346436666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7420 (or 6954 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 54.

The spelling of 424346436666 in words is "four hundred twenty-four billion, three hundred forty-six million, four hundred thirty-six thousand, six hundred sixty-six".