667231078000 has 40 divisors (see below), whose sum is σ = 1613364751440. Its totient is φ = 266892430400.

The previous prime is 667231077937. The next prime is 667231078001. The reversal of 667231078000 is 870132766.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×667231078000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667231078001) 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 7 ways as a sum of consecutive naturals, for example, 166805770 + ... + 166809769.

It is an arithmetic number, because the mean of its divisors is an integer number (40334118786).

Almost surely, 2^667231078000 is an apocalyptic number.

It is an amenable number.

667231078000 is an abundant number, since it is smaller than the sum of its proper divisors (946133673440).

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

667231078000 is a wasteful number, since it uses less digits than its factorization.

667231078000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333615562 (or 333615546 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 667231078000 in words is "six hundred sixty-seven billion, two hundred thirty-one million, seventy-eight thousand".