667231536787 has 8 divisors (see below), whose sum is σ = 680169363840. Its totient is φ = 654306619200.

The previous prime is 667231536773. The next prime is 667231536799. The reversal of 667231536787 is 787635132766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667231536787 - 2¹⁹ = 667231012499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667231536707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3122962 + ... + 3329767.

It is an arithmetic number, because the mean of its divisors is an integer number (85021170480).

Almost surely, 2^667231536787 is an apocalyptic number.

667231536787 is a deficient number, since it is larger than the sum of its proper divisors (12937827053).

667231536787 is a wasteful number, since it uses less digits than its factorization.

667231536787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454733.

The product of its digits is 53343360, while the sum is 61.

The spelling of 667231536787 in words is "six hundred sixty-seven billion, two hundred thirty-one million, five hundred thirty-six thousand, seven hundred eighty-seven".