667126272 has 80 divisors (see below), whose sum is σ = 1815276672. Its totient is φ = 217620480.

The previous prime is 667126259. The next prime is 667126279. The reversal of 667126272 is 272621766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 667126272.

It is not an unprimeable number, because it can be changed into a prime (667126279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67572 + ... + 76812.

Almost surely, 2^667126272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667126272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907638336).

667126272 is an abundant number, since it is smaller than the sum of its proper divisors (1148150400).

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

667126272 is an equidigital number, since it uses as much as digits as its factorization.

667126272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9309 (or 9293 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 667126272 is about 25828.7876602832. The cubic root of 667126272 is about 873.7811697412.

The spelling of 667126272 in words is "six hundred sixty-seven million, one hundred twenty-six thousand, two hundred seventy-two".