668022154 has 8 divisors (see below), whose sum is σ = 1004484420. Its totient is φ = 333194016.

The previous prime is 668022151. The next prime is 668022167. The reversal of 668022154 is 451220866.

668022154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 570111129 + 97911025 = 23877^2 + 9895^2 .

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

It is not an unprimeable number, because it can be changed into a prime (668022151) 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, 407509 + ... + 409144.

Almost surely, 2^668022154 is an apocalyptic number.

668022154 is a deficient number, since it is larger than the sum of its proper divisors (336462266).

668022154 is a wasteful number, since it uses less digits than its factorization.

668022154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817064.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 668022154 is about 25846.1245450841. The cubic root of 668022154 is about 874.1721275489.

The spelling of 668022154 in words is "six hundred sixty-eight million, twenty-two thousand, one hundred fifty-four".