66582811 has 12 divisors (see below), whose sum is σ = 70676424. Its totient is φ = 62686400.

The previous prime is 66582797. The next prime is 66582827. The reversal of 66582811 is 11828566.

It is not a de Polignac number, because 66582811 - 2²⁵ = 33028379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66582211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33516 + ... + 35446.

It is an arithmetic number, because the mean of its divisors is an integer number (5889702).

Almost surely, 2^66582811 is an apocalyptic number.

66582811 is a deficient number, since it is larger than the sum of its proper divisors (4093613).

66582811 is a wasteful number, since it uses less digits than its factorization.

66582811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030 (or 2001 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 66582811 is about 8159.8291036026. The cubic root of 66582811 is about 405.3100526729.

The spelling of 66582811 in words is "sixty-six million, five hundred eighty-two thousand, eight hundred eleven".