126678778 has 4 divisors (see below), whose sum is σ = 190018170. Its totient is φ = 63339388.

The previous prime is 126678751. The next prime is 126678793. The reversal of 126678778 is 877876621.

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

It can be written as a sum of positive squares in only one way, i.e., 103897249 + 22781529 = 10193^2 + 4773^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31669693 + ... + 31669696.

Almost surely, 2^126678778 is an apocalyptic number.

126678778 is a deficient number, since it is larger than the sum of its proper divisors (63339392).

126678778 is an equidigital number, since it uses as much as digits as its factorization.

126678778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63339391.

The product of its digits is 1580544, while the sum is 52.

The square root of 126678778 is about 11255.1667246647. The cubic root of 126678778 is about 502.2284241634.

The spelling of 126678778 in words is "one hundred twenty-six million, six hundred seventy-eight thousand, seven hundred seventy-eight".