667222240 has 96 divisors (see below), whose sum is σ = 1672272000. Its totient is φ = 250864128.

The previous prime is 667222223. The next prime is 667222243. The reversal of 667222240 is 42222766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667222243) 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 15 ways as a sum of consecutive naturals, for example, 421771 + ... + 423349.

It is an arithmetic number, because the mean of its divisors is an integer number (17419500).

Almost surely, 2^667222240 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 667222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836136000).

667222240 is an abundant number, since it is smaller than the sum of its proper divisors (1005049760).

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

667222240 is a wasteful number, since it uses less digits than its factorization.

667222240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 667222240 is about 25830.6453655343. The cubic root of 667222240 is about 873.8230663626.

The spelling of 667222240 in words is "six hundred sixty-seven million, two hundred twenty-two thousand, two hundred forty".