78066771 has 8 divisors (see below), whose sum is σ = 110211984. Its totient is φ = 48983040.

The previous prime is 78066767. The next prime is 78066797. The reversal of 78066771 is 17766087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78066771 - 2² = 78066767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78066871) 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, 765310 + ... + 765411.

It is an arithmetic number, because the mean of its divisors is an integer number (13776498).

Almost surely, 2^78066771 is an apocalyptic number.

78066771 is a deficient number, since it is larger than the sum of its proper divisors (32145213).

78066771 is a wasteful number, since it uses less digits than its factorization.

78066771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530741.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 78066771 is about 8835.5402211749. The cubic root of 78066771 is about 427.3877520695.

The spelling of 78066771 in words is "seventy-eight million, sixty-six thousand, seven hundred seventy-one".