667468740 has 96 divisors (see below), whose sum is σ = 1979550720. Its totient is φ = 167688576.

The previous prime is 667468729. The next prime is 667468741. The reversal of 667468740 is 47864766.

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 667468740.

It is not an unprimeable number, because it can be changed into a prime (667468741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88851 + ... + 96069.

It is an arithmetic number, because the mean of its divisors is an integer number (20620320).

Almost surely, 2^667468740 is an apocalyptic number.

667468740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667468740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989775360).

667468740 is an abundant number, since it is smaller than the sum of its proper divisors (1312081980).

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

667468740 is a wasteful number, since it uses less digits than its factorization.

667468740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7321 (or 7319 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The square root of 667468740 is about 25835.4163891353. The cubic root of 667468740 is about 873.9306621295.

The spelling of 667468740 in words is "six hundred sixty-seven million, four hundred sixty-eight thousand, seven hundred forty".