85661688003 has 16 divisors (see below), whose sum is σ = 116427436800. Its totient is φ = 56006465760.

The previous prime is 85661687963. The next prime is 85661688011. The reversal of 85661688003 is 30088616658.

It is not a de Polignac number, because 85661688003 - 2¹² = 85661683907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85661688503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500263 + ... + 649296.

It is an arithmetic number, because the mean of its divisors is an integer number (7276714800).

Almost surely, 2^85661688003 is an apocalyptic number.

85661688003 is a deficient number, since it is larger than the sum of its proper divisors (30765748797).

85661688003 is a wasteful number, since it uses less digits than its factorization.

85661688003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150042.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 85661688003 in words is "eighty-five billion, six hundred sixty-one million, six hundred eighty-eight thousand, three".