83661055 has 8 divisors (see below), whose sum is σ = 100711872. Its totient is φ = 66716448.

The previous prime is 83661049. The next prime is 83661059. The reversal of 83661055 is 55016638.

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 83661055 - 2⁵ = 83661023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83661055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83661059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24807 + ... + 27976.

It is an arithmetic number, because the mean of its divisors is an integer number (12588984).

Almost surely, 2^83661055 is an apocalyptic number.

83661055 is a deficient number, since it is larger than the sum of its proper divisors (17050817).

83661055 is a wasteful number, since it uses less digits than its factorization.

83661055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53105.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 83661055 is about 9146.6417334451. The cubic root of 83661055 is about 437.3620659047.

The spelling of 83661055 in words is "eighty-three million, six hundred sixty-one thousand, fifty-five".