668950040 has 32 divisors (see below), whose sum is σ = 1641969360. Its totient is φ = 243254400.

The previous prime is 668950031. The next prime is 668950049. The reversal of 668950040 is 40059866.

It is an interprime number because it is at equal distance from previous prime (668950031) and next prime (668950049).

It is a junction number, because it is equal to n+sod(n) for n = 668949976 and 668950003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668950049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759731 + ... + 760610.

Almost surely, 2^668950040 is an apocalyptic number.

It is an amenable number.

668950040 is an abundant number, since it is smaller than the sum of its proper divisors (973019320).

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

668950040 is a wasteful number, since it uses less digits than its factorization.

668950040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520363 (or 1520359 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 668950040 is about 25864.0685121270. The cubic root of 668950040 is about 874.5766833998.

The spelling of 668950040 in words is "six hundred sixty-eight million, nine hundred fifty thousand, forty".