3660643026 has 72 divisors (see below), whose sum is σ = 8214488100. Its totient is φ = 1178084736.

The previous prime is 3660643013. The next prime is 3660643073. The reversal of 3660643026 is 6203460663.

3660643026 is a `hidden beast` number, since 3 + 6 + 6 + 0 + 643 + 0 + 2 + 6 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3237723801 + 422919225 = 56901^2 + 20565^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3671160 + ... + 3672156.

Almost surely, 2^3660643026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3660643026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4107244050).

3660643026 is an abundant number, since it is smaller than the sum of its proper divisors (4553845074).

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

3660643026 is a wasteful number, since it uses less digits than its factorization.

3660643026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 3660643026 is about 60503.2480615710. The cubic root of 3660643026 is about 1541.1767901322.

The spelling of 3660643026 in words is "three billion, six hundred sixty million, six hundred forty-three thousand, twenty-six".