3773920661 has 36 divisors (see below), whose sum is σ = 4866681888. Its totient is φ = 2911886208.

The previous prime is 3773920589. The next prime is 3773920673. The reversal of 3773920661 is 1660293773.

It is not a de Polignac number, because 3773920661 - 2²² = 3769726357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3773920681) by changing a digit.

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, 319910 + ... + 331496.

It is an arithmetic number, because the mean of its divisors is an integer number (135185608).

Almost surely, 2^3773920661 is an apocalyptic number.

It is an amenable number.

3773920661 is a deficient number, since it is larger than the sum of its proper divisors (1092761227).

3773920661 is a wasteful number, since it uses less digits than its factorization.

3773920661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11658 (or 11634 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 3773920661 is about 61432.2444730778. The cubic root of 3773920661 is about 1556.9126784397.

The spelling of 3773920661 in words is "three billion, seven hundred seventy-three million, nine hundred twenty thousand, six hundred sixty-one".