664110251 has 8 divisors (see below), whose sum is σ = 777495264. Its totient is φ = 555353280.

The previous prime is 664110221. The next prime is 664110277. The reversal of 664110251 is 152011466.

664110251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664110251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664110251.

It is not an unprimeable number, because it can be changed into a prime (664110221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156700 + ... + 1157273.

It is an arithmetic number, because the mean of its divisors is an integer number (97186908).

Almost surely, 2^664110251 is an apocalyptic number.

664110251 is a deficient number, since it is larger than the sum of its proper divisors (113385013).

664110251 is a wasteful number, since it uses less digits than its factorization.

664110251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314021.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 664110251 is about 25770.3366489458. The cubic root of 664110251 is about 872.4624170258.

The spelling of 664110251 in words is "six hundred sixty-four million, one hundred ten thousand, two hundred fifty-one".