85666806152 has 8 divisors (see below), whose sum is σ = 160625261550. Its totient is φ = 42833403072.

The previous prime is 85666806143. The next prime is 85666806157. The reversal of 85666806152 is 25160866658.

It can be written as a sum of positive squares in only one way, i.e., 85190431876 + 476374276 = 291874^2 + 21826^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 85666806094 and 85666806103.

It is not an unprimeable number, because it can be changed into a prime (85666806157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5354175377 + ... + 5354175392.

Almost surely, 2^85666806152 is an apocalyptic number.

It is an amenable number.

85666806152 is a deficient number, since it is larger than the sum of its proper divisors (74958455398).

85666806152 is a wasteful number, since it uses less digits than its factorization.

85666806152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10708350775 (or 10708350771 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 85666806152 in words is "eighty-five billion, six hundred sixty-six million, eight hundred six thousand, one hundred fifty-two".