664011214 has 16 divisors (see below), whose sum is σ = 1006647840. Its totient is φ = 328471200.

The previous prime is 664011191. The next prime is 664011217. The reversal of 664011214 is 412110466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664011217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177564 + ... + 181264.

It is an arithmetic number, because the mean of its divisors is an integer number (62915490).

Almost surely, 2^664011214 is an apocalyptic number.

664011214 is a deficient number, since it is larger than the sum of its proper divisors (342636626).

664011214 is a wasteful number, since it uses less digits than its factorization.

664011214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 664011214 is about 25768.4150463314. The cubic root of 664011214 is about 872.4190455345.

It can be divided in two parts, 664011 and 214, that added together give a square (664225 = 815²).

The spelling of 664011214 in words is "six hundred sixty-four million, eleven thousand, two hundred fourteen".