664122155 has 8 divisors (see below), whose sum is σ = 800123184. Its totient is φ = 529180000.

The previous prime is 664122133. The next prime is 664122197. The reversal of 664122155 is 551221466.

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

It is not a de Polignac number, because 664122155 - 2⁶ = 664122091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 263336 + ... + 265845.

It is an arithmetic number, because the mean of its divisors is an integer number (100015398).

Almost surely, 2^664122155 is an apocalyptic number.

664122155 is a deficient number, since it is larger than the sum of its proper divisors (136001029).

664122155 is a wasteful number, since it uses less digits than its factorization.

664122155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529437.

The product of its digits is 14400, while the sum is 32.

The square root of 664122155 is about 25770.5676111334. The cubic root of 664122155 is about 872.4676298804.

The spelling of 664122155 in words is "six hundred sixty-four million, one hundred twenty-two thousand, one hundred fifty-five".