6664155775 has 24 divisors (see below), whose sum is σ = 8567398080. Its totient is φ = 5136109440.

The previous prime is 6664155767. The next prime is 6664155811. The reversal of 6664155775 is 5775514666.

6664155775 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 6664155775 - 2³ = 6664155767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325749 + ... + 345601.

It is an arithmetic number, because the mean of its divisors is an integer number (356974920).

Almost surely, 2^6664155775 is an apocalyptic number.

6664155775 is a deficient number, since it is larger than the sum of its proper divisors (1903242305).

6664155775 is a wasteful number, since it uses less digits than its factorization.

6664155775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20355 (or 20350 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 52.

The square root of 6664155775 is about 81634.2806362621. The cubic root of 6664155775 is about 1881.8357441394.

The spelling of 6664155775 in words is "six billion, six hundred sixty-four million, one hundred fifty-five thousand, seven hundred seventy-five".