668748039 has 4 divisors (see below), whose sum is σ = 891664056. Its totient is φ = 445832024.

The previous prime is 668748037. The next prime is 668748049. The reversal of 668748039 is 930847866.

668748039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668748039 - 2¹ = 668748037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668747982 and 668748000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668748037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111458004 + ... + 111458009.

It is an arithmetic number, because the mean of its divisors is an integer number (222916014).

Almost surely, 2^668748039 is an apocalyptic number.

668748039 is a deficient number, since it is larger than the sum of its proper divisors (222916017).

668748039 is a wasteful number, since it uses less digits than its factorization.

668748039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222916016.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 668748039 is about 25860.1631665386. The cubic root of 668748039 is about 874.4886433672.

The spelling of 668748039 in words is "six hundred sixty-eight million, seven hundred forty-eight thousand, thirty-nine".