677521646 has 16 divisors (see below), whose sum is σ = 1079775360. Its totient is φ = 317930040.

The previous prime is 677521643. The next prime is 677521661. The reversal of 677521646 is 646125776.

It is a junction number, because it is equal to n+sod(n) for n = 677521597 and 677521606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677521643) 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 7 ways as a sum of consecutive naturals, for example, 79250 + ... + 87381.

It is an arithmetic number, because the mean of its divisors is an integer number (67485960).

Almost surely, 2^677521646 is an apocalyptic number.

677521646 is a deficient number, since it is larger than the sum of its proper divisors (402253714).

677521646 is a wasteful number, since it uses less digits than its factorization.

677521646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166759.

The product of its digits is 423360, while the sum is 44.

The square root of 677521646 is about 26029.2459744803. The cubic root of 677521646 is about 878.2963103438.

The spelling of 677521646 in words is "six hundred seventy-seven million, five hundred twenty-one thousand, six hundred forty-six".