667735073 has 4 divisors (see below), whose sum is σ = 667797780. Its totient is φ = 667672368.

The previous prime is 667735067. The next prime is 667735093. The reversal of 667735073 is 370537766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 80496784 + 587238289 = 8972^2 + 24233^2 .

It is a cyclic number.

It is not a de Polignac number, because 667735073 - 2⁸ = 667734817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667735043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10958 + ... + 38151.

It is an arithmetic number, because the mean of its divisors is an integer number (166949445).

Almost surely, 2^667735073 is an apocalyptic number.

It is an amenable number.

667735073 is a deficient number, since it is larger than the sum of its proper divisors (62707).

667735073 is a wasteful number, since it uses less digits than its factorization.

667735073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62706.

The product of its (nonzero) digits is 555660, while the sum is 44.

The square root of 667735073 is about 25840.5702916944. The cubic root of 667735073 is about 874.0468851123.

The spelling of 667735073 in words is "six hundred sixty-seven million, seven hundred thirty-five thousand, seventy-three".