78066530 has 16 divisors (see below), whose sum is σ = 143510400. Its totient is φ = 30562032.

The previous prime is 78066529. The next prime is 78066539. The reversal of 78066530 is 3566087.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78066539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82580 + ... + 83519.

It is an arithmetic number, because the mean of its divisors is an integer number (8969400).

Almost surely, 2^78066530 is an apocalyptic number.

78066530 is a deficient number, since it is larger than the sum of its proper divisors (65443870).

78066530 is a wasteful number, since it uses less digits than its factorization.

78066530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166153.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 78066530 is about 8835.5265830623. The cubic root of 78066530 is about 427.3873122726.

The spelling of 78066530 in words is "seventy-eight million, sixty-six thousand, five hundred thirty".