667263073 has 8 divisors (see below), whose sum is σ = 706748328. Its totient is φ = 627803904.

The previous prime is 667263067. The next prime is 667263083. The reversal of 667263073 is 370362766.

It can be written as a sum of positive squares in 4 ways, for example, as 30558784 + 636704289 = 5528^2 + 25233^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 667263073 - 2²⁵ = 633708641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667263013) 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, 76315 + ... + 84607.

It is an arithmetic number, because the mean of its divisors is an integer number (88343541).

Almost surely, 2^667263073 is an apocalyptic number.

It is an amenable number.

667263073 is a deficient number, since it is larger than the sum of its proper divisors (39485255).

667263073 is a wasteful number, since it uses less digits than its factorization.

667263073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 667263073 is about 25831.4357518122. The cubic root of 667263073 is about 873.8408915526.

The spelling of 667263073 in words is "six hundred sixty-seven million, two hundred sixty-three thousand, seventy-three".