85747661 has 8 divisors (see below), whose sum is σ = 86412000. Its totient is φ = 85086288.

The previous prime is 85747637. The next prime is 85747679. The reversal of 85747661 is 16674758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85747661 - 2¹⁴ = 85731277 is a prime.

It is a super-2 number, since 2×85747661² = 14705322733941842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85747601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112895 + ... + 113651.

It is an arithmetic number, because the mean of its divisors is an integer number (10801500).

Almost surely, 2^85747661 is an apocalyptic number.

It is an amenable number.

85747661 is a deficient number, since it is larger than the sum of its proper divisors (664339).

85747661 is a wasteful number, since it uses less digits than its factorization.

85747661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483.

The product of its digits is 282240, while the sum is 44.

The square root of 85747661 is about 9260.0032937359. The cubic root of 85747661 is about 440.9683579637.

The spelling of 85747661 in words is "eighty-five million, seven hundred forty-seven thousand, six hundred sixty-one".