628678166 has 8 divisors (see below), whose sum is σ = 943533360. Its totient is φ = 314167048.

The previous prime is 628678151. The next prime is 628678199. The reversal of 628678166 is 661876826.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81401 + ... + 88788.

It is an arithmetic number, because the mean of its divisors is an integer number (117941670).

Almost surely, 2^628678166 is an apocalyptic number.

628678166 is a deficient number, since it is larger than the sum of its proper divisors (314855194).

628678166 is a wasteful number, since it uses less digits than its factorization.

628678166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172038.

The product of its digits is 1161216, while the sum is 50.

The square root of 628678166 is about 25073.4554060664. The cubic root of 628678166 is about 856.6619139735.

The spelling of 628678166 in words is "six hundred twenty-eight million, six hundred seventy-eight thousand, one hundred sixty-six".