628264066 has 8 divisors (see below), whose sum is σ = 942594444. Its totient is φ = 314065920.

The previous prime is 628264031. The next prime is 628264069. The reversal of 628264066 is 660462826.

It can be written as a sum of positive squares in 2 ways, for example, as 575280225 + 52983841 = 23985^2 + 7279^2 .

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 (628264069) 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, 20175 + ... + 40786.

Almost surely, 2^628264066 is an apocalyptic number.

628264066 is a deficient number, since it is larger than the sum of its proper divisors (314330378).

628264066 is a wasteful number, since it uses less digits than its factorization.

628264066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66116.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 628264066 is about 25065.1963088263. The cubic root of 628264066 is about 856.4737829423.

The spelling of 628264066 in words is "six hundred twenty-eight million, two hundred sixty-four thousand, sixty-six".