668074754 has 4 divisors (see below), whose sum is σ = 1002112134. Its totient is φ = 334037376.

The previous prime is 668074747. The next prime is 668074763. The reversal of 668074754 is 457470866.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 350700529 + 317374225 = 18727^2 + 17815^2 .

It is a junction number, because it is equal to n+sod(n) for n = 668074699 and 668074708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167018687 + ... + 167018690.

Almost surely, 2^668074754 is an apocalyptic number.

668074754 is a deficient number, since it is larger than the sum of its proper divisors (334037380).

668074754 is a wasteful number, since it uses less digits than its factorization.

668074754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334037379.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The square root of 668074754 is about 25847.1420857316. The cubic root of 668074754 is about 874.1950710230.

The spelling of 668074754 in words is "six hundred sixty-eight million, seventy-four thousand, seven hundred fifty-four".