78052066 has 16 divisors (see below), whose sum is σ = 125108280. Its totient is φ = 36391680.

The previous prime is 78052063. The next prime is 78052081. The reversal of 78052066 is 66025087.

It can be written as a sum of positive squares in 4 ways, for example, as 74736025 + 3316041 = 8645^2 + 1821^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (78052063) 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, 6825 + ... + 14236.

Almost surely, 2^78052066 is an apocalyptic number.

78052066 is a deficient number, since it is larger than the sum of its proper divisors (47056214).

78052066 is a wasteful number, since it uses less digits than its factorization.

78052066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21189.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78052066 is about 8834.7080313953. The cubic root of 78052066 is about 427.3609155061.

The spelling of 78052066 in words is "seventy-eight million, fifty-two thousand, sixty-six".