668753542 has 8 divisors (see below), whose sum is σ = 1027597032. Its totient is φ = 326221200.

The previous prime is 668753537. The next prime is 668753573. The reversal of 668753542 is 245357866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 668753492 and 668753501.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4077684 + ... + 4077847.

It is an arithmetic number, because the mean of its divisors is an integer number (128449629).

Almost surely, 2^668753542 is an apocalyptic number.

668753542 is a deficient number, since it is larger than the sum of its proper divisors (358843490).

668753542 is a wasteful number, since it uses less digits than its factorization.

668753542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8155574.

The product of its digits is 1209600, while the sum is 46.

The square root of 668753542 is about 25860.2695654937. The cubic root of 668753542 is about 874.4910420273.

The spelling of 668753542 in words is "six hundred sixty-eight million, seven hundred fifty-three thousand, five hundred forty-two".