678772033 has 4 divisors (see below), whose sum is σ = 683327700. Its totient is φ = 674216368.

The previous prime is 678772027. The next prime is 678772037. The reversal of 678772033 is 330277876.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50367409 + 628404624 = 7097^2 + 25068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678772033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678772037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277610 + ... + 2277907.

It is an arithmetic number, because the mean of its divisors is an integer number (170831925).

Almost surely, 2^678772033 is an apocalyptic number.

It is an amenable number.

678772033 is a deficient number, since it is larger than the sum of its proper divisors (4555667).

678772033 is a wasteful number, since it uses less digits than its factorization.

678772033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555666.

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 678772033 is about 26053.2537891143. The cubic root of 678772033 is about 878.8362859020.

The spelling of 678772033 in words is "six hundred seventy-eight million, seven hundred seventy-two thousand, thirty-three".