3768667661 has 16 divisors (see below), whose sum is σ = 4435259328. Its totient is φ = 3163680000.

The previous prime is 3768667649. The next prime is 3768667681. The reversal of 3768667661 is 1667668673.

It is a cyclic number.

It is not a de Polignac number, because 3768667661 - 2¹⁸ = 3768405517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3768667597 and 3768667606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3768667621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180215 + ... + 200036.

It is an arithmetic number, because the mean of its divisors is an integer number (277203708).

Almost surely, 2^3768667661 is an apocalyptic number.

It is an amenable number.

3768667661 is a deficient number, since it is larger than the sum of its proper divisors (666591667).

3768667661 is a wasteful number, since it uses less digits than its factorization.

3768667661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380332.

The product of its digits is 9144576, while the sum is 56.

The square root of 3768667661 is about 61389.4751647218. The cubic root of 3768667661 is about 1556.1899764573.

The spelling of 3768667661 in words is "three billion, seven hundred sixty-eight million, six hundred sixty-seven thousand, six hundred sixty-one".