667347831550 has 12 divisors (see below), whose sum is σ = 1241266966776. Its totient is φ = 266939132600.

The previous prime is 667347831547. The next prime is 667347831611. The reversal of 667347831550 is 55138743766.

It is a happy number.

It is a super-3 number, since 3×667347831550³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667347831491 and 667347831500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6673478266 + ... + 6673478365.

It is an arithmetic number, because the mean of its divisors is an integer number (103438913898).

Almost surely, 2^667347831550 is an apocalyptic number.

667347831550 is a deficient number, since it is larger than the sum of its proper divisors (573919135226).

667347831550 is a wasteful number, since it uses less digits than its factorization.

667347831550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346956643 (or 13346956638 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 667347831550 in words is "six hundred sixty-seven billion, three hundred forty-seven million, eight hundred thirty-one thousand, five hundred fifty".