196606778 has 16 divisors (see below), whose sum is σ = 298627560. Its totient is φ = 97069056.

The previous prime is 196606771. The next prime is 196606807. The reversal of 196606778 is 877606691.

It can be written as a sum of positive squares in 4 ways, for example, as 146579449 + 50027329 = 12107^2 + 7073^2 .

It is not an unprimeable number, because it can be changed into a prime (196606771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114188 + ... + 115896.

Almost surely, 2^196606778 is an apocalyptic number.

196606778 is a deficient number, since it is larger than the sum of its proper divisors (102020782).

196606778 is a wasteful number, since it uses less digits than its factorization.

196606778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 196606778 is about 14021.6538967413. The cubic root of 196606778 is about 581.4773849938.

The spelling of 196606778 in words is "one hundred ninety-six million, six hundred six thousand, seven hundred seventy-eight".