66824085 has 32 divisors (see below), whose sum is σ = 112654080. Its totient is φ = 33758208.

The previous prime is 66824071. The next prime is 66824099. The reversal of 66824085 is 58042866.

It is an interprime number because it is at equal distance from previous prime (66824071) and next prime (66824099).

It is not a de Polignac number, because 66824085 - 2¹² = 66819989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36717 + ... + 38493.

It is an arithmetic number, because the mean of its divisors is an integer number (3520440).

Almost surely, 2^66824085 is an apocalyptic number.

It is an amenable number.

66824085 is a deficient number, since it is larger than the sum of its proper divisors (45829995).

66824085 is a wasteful number, since it uses less digits than its factorization.

66824085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 66824085 is about 8174.5999902136. The cubic root of 66824085 is about 405.7990322006.

It can be divided in two parts, 668 and 24085, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 66824085 in words is "sixty-six million, eight hundred twenty-four thousand, eighty-five".