664042126 has 16 divisors (see below), whose sum is σ = 1101921408. Its totient is φ = 297585400.

The previous prime is 664042111. The next prime is 664042129. The reversal of 664042126 is 621240466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664042129) 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, 211000 + ... + 214123.

It is an arithmetic number, because the mean of its divisors is an integer number (68870088).

Almost surely, 2^664042126 is an apocalyptic number.

664042126 is a deficient number, since it is larger than the sum of its proper divisors (437879282).

664042126 is a wasteful number, since it uses less digits than its factorization.

664042126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425207.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 664042126 is about 25769.0148434122. The cubic root of 664042126 is about 872.4325833576.

The spelling of 664042126 in words is "six hundred sixty-four million, forty-two thousand, one hundred twenty-six".