668673468 has 30 divisors (see below), whose sum is σ = 1748045376. Its totient is φ = 222891048.

The previous prime is 668673463. The next prime is 668673497. The reversal of 668673468 is 864376866.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668673463) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1031580 + ... + 1032227.

Almost surely, 2^668673468 is an apocalyptic number.

It is an amenable number.

668673468 is an abundant number, since it is smaller than the sum of its proper divisors (1079371908).

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

668673468 is a wasteful number, since it uses less digits than its factorization.

668673468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063823 (or 2063812 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 668673468 is about 25858.7213140944. The cubic root of 668673468 is about 874.4561378928.

The spelling of 668673468 in words is "six hundred sixty-eight million, six hundred seventy-three thousand, four hundred sixty-eight".