66220583 has 16 divisors (see below), whose sum is σ = 78029952. Its totient is φ = 55404000.

The previous prime is 66220547. The next prime is 66220607. The reversal of 66220583 is 38502266.

It is a cyclic number.

It is not a de Polignac number, because 66220583 - 2¹⁴ = 66204199 is a prime.

It is a super-2 number, since 2×66220583² = 8770331225719778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66220523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81248 + ... + 82058.

It is an arithmetic number, because the mean of its divisors is an integer number (4876872).

Almost surely, 2^66220583 is an apocalyptic number.

66220583 is a deficient number, since it is larger than the sum of its proper divisors (11809369).

66220583 is a wasteful number, since it uses less digits than its factorization.

66220583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 66220583 is about 8137.6030254615. The cubic root of 66220583 is about 404.5737180148.

The spelling of 66220583 in words is "sixty-six million, two hundred twenty thousand, five hundred eighty-three".