3666778776663 has 32 divisors (see below), whose sum is σ = 5080630226112. Its totient is φ = 2350378368000.

The previous prime is 3666778776653. The next prime is 3666778776679.

3666778776663 is nontrivially palindromic in base 10.

3666778776663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3666778776663 - 2³⁸ = 3391900869719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666778776613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5527045 + ... + 6154817.

It is an arithmetic number, because the mean of its divisors is an integer number (158769694566).

Almost surely, 2^{3666778776663} is an apocalyptic number.

3666778776663 is a deficient number, since it is larger than the sum of its proper divisors (1413851449449).

3666778776663 is a wasteful number, since it uses less digits than its factorization.

3666778776663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628435.

The product of its digits is 8065516032, while the sum is 78.

The spelling of 3666778776663 in words is "three trillion, six hundred sixty-six billion, seven hundred seventy-eight million, seven hundred seventy-six thousand, six hundred sixty-three".