668022078 has 8 divisors (see below), whose sum is σ = 1336044168. Its totient is φ = 222674024.

The previous prime is 668022067. The next prime is 668022101. The reversal of 668022078 is 870220866.

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

668022078 is an admirable number.

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, 55668501 + ... + 55668512.

It is an arithmetic number, because the mean of its divisors is an integer number (167005521).

Almost surely, 2^668022078 is an apocalyptic number.

668022078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

668022078 is a wasteful number, since it uses less digits than its factorization.

668022078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111337018.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 668022078 is about 25846.1230748443. The cubic root of 668022078 is about 874.1720943977.

The spelling of 668022078 in words is "six hundred sixty-eight million, twenty-two thousand, seventy-eight".