664851627 has 48 divisors (see below), whose sum is σ = 1077654240. Its totient is φ = 391564800.

The previous prime is 664851619. The next prime is 664851673. The reversal of 664851627 is 726158466.

664851627 is a `hidden beast` number, since 6 + 6 + 485 + 162 + 7 = 666.

664851627 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664851627 - 2³ = 664851619 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (664851527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 536853 + ... + 538089.

It is an arithmetic number, because the mean of its divisors is an integer number (22451130).

Almost surely, 2^664851627 is an apocalyptic number.

664851627 is a deficient number, since it is larger than the sum of its proper divisors (412802613).

664851627 is a wasteful number, since it uses less digits than its factorization.

664851627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404 (or 1401 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 664851627 is about 25784.7169268930. The cubic root of 664851627 is about 872.7869525742.

The spelling of 664851627 in words is "six hundred sixty-four million, eight hundred fifty-one thousand, six hundred twenty-seven".