678542770 has 8 divisors (see below), whose sum is σ = 1221377004. Its totient is φ = 271417104.

The previous prime is 678542737. The next prime is 678542789. The reversal of 678542770 is 77245876.

It can be written as a sum of positive squares in 2 ways, for example, as 656948161 + 21594609 = 25631^2 + 4647^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 678542770.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33927129 + ... + 33927148.

Almost surely, 2^678542770 is an apocalyptic number.

678542770 is a deficient number, since it is larger than the sum of its proper divisors (542834234).

678542770 is a wasteful number, since it uses less digits than its factorization.

678542770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67854284.

The product of its (nonzero) digits is 658560, while the sum is 46.

The square root of 678542770 is about 26048.8535256353. The cubic root of 678542770 is about 878.7373290984.

The spelling of 678542770 in words is "six hundred seventy-eight million, five hundred forty-two thousand, seven hundred seventy".