667072307 has 4 divisors (see below), whose sum is σ = 727715256. Its totient is φ = 606429360.

The previous prime is 667072303. The next prime is 667072313. The reversal of 667072307 is 703270766.

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

It is a cyclic number.

It is not a de Polignac number, because 667072307 - 2² = 667072303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667072303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30321458 + ... + 30321479.

It is an arithmetic number, because the mean of its divisors is an integer number (181928814).

Almost surely, 2^667072307 is an apocalyptic number.

667072307 is a deficient number, since it is larger than the sum of its proper divisors (60642949).

667072307 is a wasteful number, since it uses less digits than its factorization.

667072307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60642948.

The product of its (nonzero) digits is 74088, while the sum is 38.

The square root of 667072307 is about 25827.7429714638. The cubic root of 667072307 is about 873.7576085483.

The spelling of 667072307 in words is "six hundred sixty-seven million, seventy-two thousand, three hundred seven".