677646225 has 36 divisors (see below), whose sum is σ = 1230396076. Its totient is φ = 356451840.

The previous prime is 677646187. The next prime is 677646247. The reversal of 677646225 is 522646776.

It can be written as a sum of positive squares in 6 ways, for example, as 28772496 + 648873729 = 5364^2 + 25473^2 .

It is not a de Polignac number, because 677646225 - 2¹³ = 677638033 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4204 + ... + 37053.

Almost surely, 2^677646225 is an apocalyptic number.

It is an amenable number.

677646225 is a deficient number, since it is larger than the sum of its proper divisors (552749851).

677646225 is a wasteful number, since it uses less digits than its factorization.

677646225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41346 (or 41338 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 677646225 is about 26031.6389226649. The cubic root of 677646225 is about 878.3501391629.

The spelling of 677646225 in words is "six hundred seventy-seven million, six hundred forty-six thousand, two hundred twenty-five".