667406740716 has 144 divisors (see below), whose sum is σ = 1807214354400. Its totient is φ = 207060074496.

The previous prime is 667406740691. The next prime is 667406740723. The reversal of 667406740716 is 617047604766.

667406740716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12806520 + ... + 12858528.

Almost surely, 2^667406740716 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 667406740716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903607177200).

667406740716 is an abundant number, since it is smaller than the sum of its proper divisors (1139807613684).

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

667406740716 is a wasteful number, since it uses less digits than its factorization.

667406740716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52368 (or 52363 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 667406740716 in words is "six hundred sixty-seven billion, four hundred six million, seven hundred forty thousand, seven hundred sixteen".