82661533 has 8 divisors (see below), whose sum is σ = 87112800. Its totient is φ = 78220368.

The previous prime is 82661519. The next prime is 82661539. The reversal of 82661533 is 33516628.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82661533 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 (82661539) 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, 19110 + ... + 23032.

It is an arithmetic number, because the mean of its divisors is an integer number (10889100).

Almost surely, 2^82661533 is an apocalyptic number.

It is an amenable number.

82661533 is a deficient number, since it is larger than the sum of its proper divisors (4451267).

82661533 is a wasteful number, since it uses less digits than its factorization.

82661533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051.

The product of its digits is 25920, while the sum is 34.

The square root of 82661533 is about 9091.8388129135. The cubic root of 82661533 is about 435.6133207863.

The spelling of 82661533 in words is "eighty-two million, six hundred sixty-one thousand, five hundred thirty-three".