667487073 has 16 divisors (see below), whose sum is σ = 972032256. Its totient is φ = 404061840.

The previous prime is 667487069. The next prime is 667487123. The reversal of 667487073 is 370784766.

It is not a de Polignac number, because 667487073 - 2² = 667487069 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667487003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17686 + ... + 40592.

It is an arithmetic number, because the mean of its divisors is an integer number (60752016).

Almost surely, 2^667487073 is an apocalyptic number.

It is an amenable number.

667487073 is a deficient number, since it is larger than the sum of its proper divisors (304545183).

667487073 is a wasteful number, since it uses less digits than its factorization.

667487073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23804.

The product of its (nonzero) digits is 1185408, while the sum is 48.

The square root of 667487073 is about 25835.7711903477. The cubic root of 667487073 is about 873.9386633152.

The spelling of 667487073 in words is "six hundred sixty-seven million, four hundred eighty-seven thousand, seventy-three".