6664155774 has 8 divisors (see below), whose sum is σ = 13328311560. Its totient is φ = 2221385256.

The previous prime is 6664155767. The next prime is 6664155811. The reversal of 6664155774 is 4775514666.

It is a sphenic number, since it is the product of 3 distinct primes.

6664155774 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555346309 + ... + 555346320.

It is an arithmetic number, because the mean of its divisors is an integer number (1666038945).

Almost surely, 2^6664155774 is an apocalyptic number.

6664155774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6664155774 is a wasteful number, since it uses less digits than its factorization.

6664155774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110692634.

The product of its digits is 4233600, while the sum is 51.

The square root of 6664155774 is about 81634.2806301372. The cubic root of 6664155774 is about 1881.8357440453.

The spelling of 6664155774 in words is "six billion, six hundred sixty-four million, one hundred fifty-five thousand, seven hundred seventy-four".