85661607 has 4 divisors (see below), whose sum is σ = 114215480. Its totient is φ = 57107736.

The previous prime is 85661603. The next prime is 85661651. The reversal of 85661607 is 70616658.

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

It is not a de Polignac number, because 85661607 - 2² = 85661603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85661603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14276932 + ... + 14276937.

It is an arithmetic number, because the mean of its divisors is an integer number (28553870).

Almost surely, 2^85661607 is an apocalyptic number.

85661607 is a deficient number, since it is larger than the sum of its proper divisors (28553873).

85661607 is a wasteful number, since it uses less digits than its factorization.

85661607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28553872.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 85661607 is about 9255.3555847412. The cubic root of 85661607 is about 440.8207940071.

It can be divided in two parts, 85661 and 607, that added together give a palindrome (86268).

The spelling of 85661607 in words is "eighty-five million, six hundred sixty-one thousand, six hundred seven".