667347831551 has 16 divisors (see below), whose sum is σ = 684444515328. Its totient is φ = 650373300000.

The previous prime is 667347831547. The next prime is 667347831611. The reversal of 667347831551 is 155138743766.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 667347831551 - 2² = 667347831547 is a prime.

It is a super-3 number, since 3×667347831551³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667347831511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82374401 + ... + 82382501.

It is an arithmetic number, because the mean of its divisors is an integer number (42777782208).

Almost surely, 2^667347831551 is an apocalyptic number.

667347831551 is a deficient number, since it is larger than the sum of its proper divisors (17096683777).

667347831551 is a wasteful number, since it uses less digits than its factorization.

667347831551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15382.

The product of its digits is 12700800, while the sum is 56.

The spelling of 667347831551 in words is "six hundred sixty-seven billion, three hundred forty-seven million, eight hundred thirty-one thousand, five hundred fifty-one".