667400703408 has 120 divisors (see below), whose sum is σ = 1888388941920. Its totient is φ = 220026931200.

The previous prime is 667400703407. The next prime is 667400703427. The reversal of 667400703408 is 804307004766.

It is not an unprimeable number, because it can be changed into a prime (667400703407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4912360 + ... + 5046392.

It is an arithmetic number, because the mean of its divisors is an integer number (15736574516).

Almost surely, 2^667400703408 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 667400703408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944194470960).

667400703408 is an abundant number, since it is smaller than the sum of its proper divisors (1220988238512).

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

667400703408 is a wasteful number, since it uses less digits than its factorization.

667400703408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134427 (or 134418 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 667400703408 in words is "six hundred sixty-seven billion, four hundred million, seven hundred three thousand, four hundred eight".