78041866 has 32 divisors (see below), whose sum is σ = 142473600. Its totient is φ = 31297536.

The previous prime is 78041839. The next prime is 78041867. The reversal of 78041866 is 66814087.

It is not an unprimeable number, because it can be changed into a prime (78041867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45085 + ... + 46783.

It is an arithmetic number, because the mean of its divisors is an integer number (4452300).

Almost surely, 2^78041866 is an apocalyptic number.

78041866 is a deficient number, since it is larger than the sum of its proper divisors (64431734).

78041866 is a wasteful number, since it uses less digits than its factorization.

78041866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 78041866 is about 8834.1307438819. The cubic root of 78041866 is about 427.3422985689.

The spelling of 78041866 in words is "seventy-eight million, forty-one thousand, eight hundred sixty-six".