3666621742 has 16 divisors (see below), whose sum is σ = 6312619872. Its totient is φ = 1564663680.

The previous prime is 3666621719. The next prime is 3666621769. The reversal of 3666621742 is 2471266663.

3666621742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3666621742² = 26888229997814229128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558759 + ... + 565282.

It is an arithmetic number, because the mean of its divisors is an integer number (394538742).

Almost surely, 2^3666621742 is an apocalyptic number.

3666621742 is a deficient number, since it is larger than the sum of its proper divisors (2645998130).

3666621742 is a wasteful number, since it uses less digits than its factorization.

3666621742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124283.

The product of its digits is 435456, while the sum is 43.

The square root of 3666621742 is about 60552.6361275874. The cubic root of 3666621742 is about 1542.0153719919.

The spelling of 3666621742 in words is "three billion, six hundred sixty-six million, six hundred twenty-one thousand, seven hundred forty-two".