2642666236 has 72 divisors (see below), whose sum is σ = 5637927456. Its totient is φ = 1078640640.

The previous prime is 2642666219. The next prime is 2642666249. The reversal of 2642666236 is 6326662462.

It is a junction number, because it is equal to n+sod(n) for n = 2642666192 and 2642666201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1157416 + ... + 1159696.

It is an arithmetic number, because the mean of its divisors is an integer number (78304548).

Almost surely, 2^2642666236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2642666236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2818963728).

2642666236 is an abundant number, since it is smaller than the sum of its proper divisors (2995261220).

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

2642666236 is a wasteful number, since it uses less digits than its factorization.

2642666236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579 (or 2570 counting only the distinct ones).

The product of its digits is 746496, while the sum is 43.

The square root of 2642666236 is about 51406.8695409475. The cubic root of 2642666236 is about 1382.5497626696.

The spelling of 2642666236 in words is "two billion, six hundred forty-two million, six hundred sixty-six thousand, two hundred thirty-six".