85666564701 has 12 divisors (see below), whose sum is σ = 127732225920. Its totient is φ = 55268751240.

The previous prime is 85666564699. The next prime is 85666564721. The reversal of 85666564701 is 10746566658.

It is not a de Polignac number, because 85666564701 - 2¹ = 85666564699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85666564721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153524031 + ... + 153524588.

It is an arithmetic number, because the mean of its divisors is an integer number (10644352160).

Almost surely, 2^85666564701 is an apocalyptic number.

It is an amenable number.

85666564701 is a deficient number, since it is larger than the sum of its proper divisors (42065661219).

85666564701 is a wasteful number, since it uses less digits than its factorization.

85666564701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307048656 (or 307048653 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 85666564701 in words is "eighty-five billion, six hundred sixty-six million, five hundred sixty-four thousand, seven hundred one".