678237725 has 24 divisors (see below), whose sum is σ = 926592480. Its totient is φ = 488360000.

The previous prime is 678237701. The next prime is 678237727. The reversal of 678237725 is 527732876.

It is not a de Polignac number, because 678237725 - 2¹⁰ = 678236701 is a prime.

It is a super-2 number, since 2×678237725² = 920012823226351250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678237725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678237727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15566 + ... + 39984.

It is an arithmetic number, because the mean of its divisors is an integer number (38608020).

Almost surely, 2^678237725 is an apocalyptic number.

It is an amenable number.

678237725 is a deficient number, since it is larger than the sum of its proper divisors (248354755).

678237725 is a wasteful number, since it uses less digits than its factorization.

678237725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24541 (or 24536 counting only the distinct ones).

The product of its digits is 987840, while the sum is 47.

The square root of 678237725 is about 26042.9976193218. The cubic root of 678237725 is about 878.6056279395.

The spelling of 678237725 in words is "six hundred seventy-eight million, two hundred thirty-seven thousand, seven hundred twenty-five".