85766666619 has 4 divisors (see below), whose sum is σ = 114355555496. Its totient is φ = 57177777744.

The previous prime is 85766666611. The next prime is 85766666641. The reversal of 85766666619 is 91666666758.

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

It is not a de Polignac number, because 85766666619 - 2³ = 85766666611 is a prime.

It is a super-2 number, since 2×85766666619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85766666619.

It is not an unprimeable number, because it can be changed into a prime (85766666611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14294444434 + ... + 14294444439.

It is an arithmetic number, because the mean of its divisors is an integer number (28588888874).

Almost surely, 2^85766666619 is an apocalyptic number.

85766666619 is a deficient number, since it is larger than the sum of its proper divisors (28588888877).

85766666619 is a wasteful number, since it uses less digits than its factorization.

85766666619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28588888876.

The product of its digits is 117573120, while the sum is 66.

The spelling of 85766666619 in words is "eighty-five billion, seven hundred sixty-six million, six hundred sixty-six thousand, six hundred nineteen".