667342140 has 48 divisors (see below), whose sum is σ = 1978476192. Its totient is φ = 167489536.

The previous prime is 667342139. The next prime is 667342147. The reversal of 667342140 is 41243766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667342147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326109 + ... + 328148.

It is an arithmetic number, because the mean of its divisors is an integer number (41218254).

Almost surely, 2^667342140 is an apocalyptic number.

667342140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667342140 is an abundant number, since it is smaller than the sum of its proper divisors (1311134052).

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

667342140 is a wasteful number, since it uses less digits than its factorization.

667342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654286 (or 654284 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 667342140 is about 25832.9661479281. The cubic root of 667342140 is about 873.8754053007.

The spelling of 667342140 in words is "six hundred sixty-seven million, three hundred forty-two thousand, one hundred forty".