84644661 has 8 divisors (see below), whose sum is σ = 113175360. Its totient is φ = 56271872.

The previous prime is 84644653. The next prime is 84644689. The reversal of 84644661 is 16644648.

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 84644661 - 2³ = 84644653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84644621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38220 + ... + 40373.

It is an arithmetic number, because the mean of its divisors is an integer number (14146920).

Almost surely, 2^84644661 is an apocalyptic number.

It is an amenable number.

84644661 is a deficient number, since it is larger than the sum of its proper divisors (28530699).

84644661 is a wasteful number, since it uses less digits than its factorization.

84644661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78955.

The product of its digits is 110592, while the sum is 39.

The square root of 84644661 is about 9200.2533117301. The cubic root of 84644661 is about 439.0694192693.

The spelling of 84644661 in words is "eighty-four million, six hundred forty-four thousand, six hundred sixty-one".