667422651237 has 4 divisors (see below), whose sum is σ = 889896868320. Its totient is φ = 444948434156.

The previous prime is 667422651211. The next prime is 667422651271. The reversal of 667422651237 is 732156224766.

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 667422651237 - 2⁸ = 667422650981 is a prime.

It is a super-2 number, since 2×667422651237² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667422651237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667422651737) 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, 111237108537 + ... + 111237108542.

It is an arithmetic number, because the mean of its divisors is an integer number (222474217080).

Almost surely, 2^667422651237 is an apocalyptic number.

It is an amenable number.

667422651237 is a deficient number, since it is larger than the sum of its proper divisors (222474217083).

667422651237 is a wasteful number, since it uses less digits than its factorization.

667422651237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222474217082.

The product of its digits is 5080320, while the sum is 51.

The spelling of 667422651237 in words is "six hundred sixty-seven billion, four hundred twenty-two million, six hundred fifty-one thousand, two hundred thirty-seven".