667341640 has 64 divisors (see below), whose sum is σ = 1718703360. Its totient is φ = 228445440.

The previous prime is 667341629. The next prime is 667341671. The reversal of 667341640 is 46143766.

667341640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 667341640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228429 + ... + 231331.

It is an arithmetic number, because the mean of its divisors is an integer number (26854740).

Almost surely, 2^667341640 is an apocalyptic number.

It is an amenable number.

667341640 is an abundant number, since it is smaller than the sum of its proper divisors (1051361720).

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

667341640 is a wasteful number, since it uses less digits than its factorization.

667341640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3738 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 667341640 is about 25832.9564703694. The cubic root of 667341640 is about 873.8751870529.

The spelling of 667341640 in words is "six hundred sixty-seven million, three hundred forty-one thousand, six hundred forty".