83445566 has 4 divisors (see below), whose sum is σ = 125168352. Its totient is φ = 41722782.

The previous prime is 83445563. The next prime is 83445569. The reversal of 83445566 is 66554438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66554438 = 2 ⋅33277219.

It is an interprime number because it is at equal distance from previous prime (83445563) and next prime (83445569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83445563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20861390 + ... + 20861393.

It is an arithmetic number, because the mean of its divisors is an integer number (31292088).

Almost surely, 2^83445566 is an apocalyptic number.

83445566 is a deficient number, since it is larger than the sum of its proper divisors (41722786).

83445566 is a wasteful number, since it uses less digits than its factorization.

83445566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41722785.

The product of its digits is 345600, while the sum is 41.

The square root of 83445566 is about 9134.8544597054. The cubic root of 83445566 is about 436.9862329340.

The spelling of 83445566 in words is "eighty-three million, four hundred forty-five thousand, five hundred sixty-six".