678244755 has 32 divisors (see below), whose sum is σ = 1113779520. Its totient is φ = 352235520.

The previous prime is 678244751. The next prime is 678244781. The reversal of 678244755 is 557442876.

It is not a de Polignac number, because 678244755 - 2² = 678244751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678244751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 619989 + ... + 621081.

It is an arithmetic number, because the mean of its divisors is an integer number (34805610).

Almost surely, 2^678244755 is an apocalyptic number.

678244755 is a deficient number, since it is larger than the sum of its proper divisors (435534765).

678244755 is a wasteful number, since it uses less digits than its factorization.

678244755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151.

The product of its digits is 1881600, while the sum is 48.

The square root of 678244755 is about 26043.1325880740. The cubic root of 678244755 is about 878.6086635400.

The spelling of 678244755 in words is "six hundred seventy-eight million, two hundred forty-four thousand, seven hundred fifty-five".