667233126738 has 12 divisors (see below), whose sum is σ = 1445671774638. Its totient is φ = 222411042240.

The previous prime is 667233126733. The next prime is 667233126743. The reversal of 667233126738 is 837621332766.

It is an interprime number because it is at equal distance from previous prime (667233126733) and next prime (667233126743).

It can be written as a sum of positive squares in only one way, i.e., 626879147049 + 40353979689 = 791757^2 + 200883^2 .

It is not an unprimeable number, because it can be changed into a prime (667233126733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18534253503 + ... + 18534253538.

Almost surely, 2^667233126738 is an apocalyptic number.

667233126738 is an abundant number, since it is smaller than the sum of its proper divisors (778438647900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667233126738 is a wasteful number, since it uses less digits than its factorization.

667233126738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37068507049 (or 37068507046 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The spelling of 667233126738 in words is "six hundred sixty-seven billion, two hundred thirty-three million, one hundred twenty-six thousand, seven hundred thirty-eight".