664010726 has 4 divisors (see below), whose sum is σ = 996016092. Its totient is φ = 332005362.

The previous prime is 664010723. The next prime is 664010729. The reversal of 664010726 is 627010466.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (664010723) and next prime (664010729).

It is a junction number, because it is equal to n+sod(n) for n = 664010692 and 664010701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664010723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166002680 + ... + 166002683.

It is an arithmetic number, because the mean of its divisors is an integer number (249004023).

Almost surely, 2^664010726 is an apocalyptic number.

664010726 is a deficient number, since it is larger than the sum of its proper divisors (332005366).

664010726 is a wasteful number, since it uses less digits than its factorization.

664010726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332005365.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 664010726 is about 25768.4055773732. The cubic root of 664010726 is about 872.4188318129.

The spelling of 664010726 in words is "six hundred sixty-four million, ten thousand, seven hundred twenty-six".