86016778 has 4 divisors (see below), whose sum is σ = 129025170. Its totient is φ = 43008388.

The previous prime is 86016767. The next prime is 86016779. The reversal of 86016778 is 87761068.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 84511249 + 1505529 = 9193^2 + 1227^2 .

It is not an unprimeable number, because it can be changed into a prime (86016779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21504193 + ... + 21504196.

Almost surely, 2^86016778 is an apocalyptic number.

86016778 is a deficient number, since it is larger than the sum of its proper divisors (43008392).

86016778 is a wasteful number, since it uses less digits than its factorization.

86016778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43008391.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 86016778 is about 9274.5230605137. The cubic root of 86016778 is about 441.4291990968.

The spelling of 86016778 in words is "eighty-six million, sixteen thousand, seven hundred seventy-eight".