85457661 has 8 divisors (see below), whose sum is σ = 114031584. Its totient is φ = 56927760.

The previous prime is 85457651. The next prime is 85457663. The reversal of 85457661 is 16675458.

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

It is not a de Polignac number, because 85457661 - 2⁶ = 85457597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85457663) 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 7 ways as a sum of consecutive naturals, for example, 6171 + ... + 14456.

It is an arithmetic number, because the mean of its divisors is an integer number (14253948).

Almost surely, 2^85457661 is an apocalyptic number.

It is an amenable number.

85457661 is a deficient number, since it is larger than the sum of its proper divisors (28573923).

85457661 is a wasteful number, since it uses less digits than its factorization.

85457661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22011.

The product of its digits is 201600, while the sum is 42.

The square root of 85457661 is about 9244.3312900393. The cubic root of 85457661 is about 440.4706757381.

The spelling of 85457661 in words is "eighty-five million, four hundred fifty-seven thousand, six hundred sixty-one".