667464165237 has 4 divisors (see below), whose sum is σ = 889952220320. Its totient is φ = 444976110156.

The previous prime is 667464165223. The next prime is 667464165253. The reversal of 667464165237 is 732561464766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 667464165237 - 2²⁶ = 667397056373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667464165437) 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, 111244027537 + ... + 111244027542.

It is an arithmetic number, because the mean of its divisors is an integer number (222488055080).

Almost surely, 2^667464165237 is an apocalyptic number.

It is an amenable number.

667464165237 is a deficient number, since it is larger than the sum of its proper divisors (222488055083).

667464165237 is a wasteful number, since it uses less digits than its factorization.

667464165237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222488055082.

The product of its digits is 30481920, while the sum is 57.

The spelling of 667464165237 in words is "six hundred sixty-seven billion, four hundred sixty-four million, one hundred sixty-five thousand, two hundred thirty-seven".