628666475 has 24 divisors (see below), whose sum is σ = 816242400. Its totient is φ = 479409920.

The previous prime is 628666469. The next prime is 628666481. The reversal of 628666475 is 574666826.

It is a happy number.

628666475 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (628666469) and next prime (628666481).

It is not a de Polignac number, because 628666475 - 2⁴ = 628666459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180551 + ... + 183999.

It is an arithmetic number, because the mean of its divisors is an integer number (34010100).

Almost surely, 2^628666475 is an apocalyptic number.

628666475 is a deficient number, since it is larger than the sum of its proper divisors (187575925).

628666475 is a wasteful number, since it uses less digits than its factorization.

628666475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799 (or 3794 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The square root of 628666475 is about 25073.2222699836. Note that the first 4 decimals coincide. The cubic root of 628666475 is about 856.6566037331.

The spelling of 628666475 in words is "six hundred twenty-eight million, six hundred sixty-six thousand, four hundred seventy-five".