85437661 has 8 divisors (see below), whose sum is σ = 90097920. Its totient is φ = 80793792.

The previous prime is 85437659. The next prime is 85437679. The reversal of 85437661 is 16673458.

It is a happy number.

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 85437661 - 2¹ = 85437659 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 (85437641) 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, 7476 + ... + 15058.

It is an arithmetic number, because the mean of its divisors is an integer number (11262240).

Almost surely, 2^85437661 is an apocalyptic number.

It is an amenable number.

85437661 is a deficient number, since it is larger than the sum of its proper divisors (4660259).

85437661 is a wasteful number, since it uses less digits than its factorization.

85437661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195.

The product of its digits is 120960, while the sum is 40.

The square root of 85437661 is about 9243.2494827306. The cubic root of 85437661 is about 440.4363113494.

The spelling of 85437661 in words is "eighty-five million, four hundred thirty-seven thousand, six hundred sixty-one".