667243976 has 96 divisors (see below), whose sum is σ = 1548849600. Its totient is φ = 267926400.

The previous prime is 667243949. The next prime is 667243979. The reversal of 667243976 is 679342766.

667243976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (667243979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 751805 + ... + 752691.

It is an arithmetic number, because the mean of its divisors is an integer number (16133850).

Almost surely, 2^667243976 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 667243976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774424800).

667243976 is an abundant number, since it is smaller than the sum of its proper divisors (881605624).

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

667243976 is a wasteful number, since it uses less digits than its factorization.

667243976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1016 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 50.

The square root of 667243976 is about 25831.0661026602. The cubic root of 667243976 is about 873.8325550611.

The spelling of 667243976 in words is "six hundred sixty-seven million, two hundred forty-three thousand, nine hundred seventy-six".