3666738440 has 16 divisors (see below), whose sum is σ = 8250161580. Its totient is φ = 1466695360.

The previous prime is 3666738421. The next prime is 3666738457. The reversal of 3666738440 is 448376663.

It can be written as a sum of positive squares in 2 ways, for example, as 3621391684 + 45346756 = 60178^2 + 6734^2 .

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 3 ways as a sum of consecutive naturals, for example, 45834191 + ... + 45834270.

Almost surely, 2^3666738440 is an apocalyptic number.

It is an amenable number.

3666738440 is an abundant number, since it is smaller than the sum of its proper divisors (4583423140).

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

3666738440 is a wasteful number, since it uses less digits than its factorization.

3666738440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91668472 (or 91668468 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The square root of 3666738440 is about 60553.5997278444. The cubic root of 3666738440 is about 1542.0317311197.

The spelling of 3666738440 in words is "three billion, six hundred sixty-six million, seven hundred thirty-eight thousand, four hundred forty".