667464134537 has 4 divisors (see below), whose sum is σ = 667466163840. Its totient is φ = 667462105236.

The previous prime is 667464134527. The next prime is 667464134543. The reversal of 667464134537 is 735431464766.

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 a cyclic number.

It is not a de Polignac number, because 667464134537 - 2⁴ = 667464134521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667464134527) 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, 395237 + ... + 1221122.

It is an arithmetic number, because the mean of its divisors is an integer number (166866540960).

Almost surely, 2^667464134537 is an apocalyptic number.

It is an amenable number.

667464134537 is a deficient number, since it is larger than the sum of its proper divisors (2029303).

667464134537 is a wasteful number, since it uses less digits than its factorization.

667464134537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029302.

The product of its digits is 30481920, while the sum is 56.

The spelling of 667464134537 in words is "six hundred sixty-seven billion, four hundred sixty-four million, one hundred thirty-four thousand, five hundred thirty-seven".