678625629 has 16 divisors (see below), whose sum is σ = 990260544. Its totient is φ = 409968000.

The previous prime is 678625627. The next prime is 678625631. The reversal of 678625629 is 926526876.

It is an interprime number because it is at equal distance from previous prime (678625627) and next prime (678625631).

It is not a de Polignac number, because 678625629 - 2¹ = 678625627 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678625627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22522 + ... + 43179.

It is an arithmetic number, because the mean of its divisors is an integer number (61891284).

Almost surely, 2^678625629 is an apocalyptic number.

It is an amenable number.

678625629 is a deficient number, since it is larger than the sum of its proper divisors (311634915).

678625629 is a wasteful number, since it uses less digits than its factorization.

678625629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66028.

The product of its digits is 2177280, while the sum is 51.

The square root of 678625629 is about 26050.4439309583. The cubic root of 678625629 is about 878.7730961058.

The spelling of 678625629 in words is "six hundred seventy-eight million, six hundred twenty-five thousand, six hundred twenty-nine".