678677632 has 16 divisors (see below), whose sum is σ = 1352053350. Its totient is φ = 339338752.

The previous prime is 678677617. The next prime is 678677651. The reversal of 678677632 is 236776876.

It can be written as a sum of positive squares in only one way, i.e., 486467136 + 192210496 = 22056^2 + 13864^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 678677632.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2650957 + ... + 2651212.

Almost surely, 2^678677632 is an apocalyptic number.

It is an amenable number.

678677632 is a deficient number, since it is larger than the sum of its proper divisors (673375718).

678677632 is an equidigital number, since it uses as much as digits as its factorization.

678677632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302183 (or 5302171 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 52.

The square root of 678677632 is about 26051.4420330238. The cubic root of 678677632 is about 878.7955422912.

The spelling of 678677632 in words is "six hundred seventy-eight million, six hundred seventy-seven thousand, six hundred thirty-two".