667232838737 has 4 divisors (see below), whose sum is σ = 667509586416. Its totient is φ = 666956091060.

The previous prime is 667232838697. The next prime is 667232838739. The reversal of 667232838737 is 737838232766.

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, and also an emirpimes, since its reverse is a distinct semiprime: 737838232766 = 2 ⋅368919116383.

It is a cyclic number.

It is not a de Polignac number, because 667232838737 - 2²⁶ = 667165729873 is a prime.

It is a super-2 number, since 2×667232838737² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667232838737.

It is not an unprimeable number, because it can be changed into a prime (667232838739) 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, 138370223 + ... + 138375044.

It is an arithmetic number, because the mean of its divisors is an integer number (166877396604).

Almost surely, 2^667232838737 is an apocalyptic number.

It is an amenable number.

667232838737 is a deficient number, since it is larger than the sum of its proper divisors (276747679).

667232838737 is a wasteful number, since it uses less digits than its factorization.

667232838737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276747678.

The product of its digits is 85349376, while the sum is 62.

The spelling of 667232838737 in words is "six hundred sixty-seven billion, two hundred thirty-two million, eight hundred thirty-eight thousand, seven hundred thirty-seven".