667233126531 has 12 divisors (see below), whose sum is σ = 1020474193752. Its totient is φ = 418656079296.

The previous prime is 667233126529. The next prime is 667233126541. The reversal of 667233126531 is 135621332766.

It is a happy number.

667233126531 is a `hidden beast` number, since 6 + 6 + 72 + 33 + 12 + 6 + 531 = 666.

It is not a de Polignac number, because 667233126531 - 2¹ = 667233126529 is a prime.

It is a super-2 number, since 2×667233126531² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (667233126541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2180500261 + ... + 2180500566.

It is an arithmetic number, because the mean of its divisors is an integer number (85039516146).

Almost surely, 2^667233126531 is an apocalyptic number.

667233126531 is a deficient number, since it is larger than the sum of its proper divisors (353241067221).

667233126531 is a wasteful number, since it uses less digits than its factorization.

667233126531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361000850 (or 4361000847 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The spelling of 667233126531 in words is "six hundred sixty-seven billion, two hundred thirty-three million, one hundred twenty-six thousand, five hundred thirty-one".