83664572 has 6 divisors (see below), whose sum is σ = 146413008. Its totient is φ = 41832284.

The previous prime is 83664571. The next prime is 83664577. The reversal of 83664572 is 27546638.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83664571) 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 as a sum of consecutive naturals, namely, 10458068 + ... + 10458075.

It is an arithmetic number, because the mean of its divisors is an integer number (24402168).

Almost surely, 2^83664572 is an apocalyptic number.

It is an amenable number.

83664572 is a deficient number, since it is larger than the sum of its proper divisors (62748436).

83664572 is a wasteful number, since it uses less digits than its factorization.

83664572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20916147 (or 20916145 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 83664572 is about 9146.8339877796. The cubic root of 83664572 is about 437.3681945263.

The spelling of 83664572 in words is "eighty-three million, six hundred sixty-four thousand, five hundred seventy-two".