66576005 has 18 divisors (see below), whose sum is σ = 82817718. Its totient is φ = 51377920.

The previous prime is 66575983. The next prime is 66576049. The reversal of 66576005 is 50067566.

It can be written as a sum of positive squares in 9 ways, for example, as 63648484 + 2927521 = 7978^2 + 1711^2 .

It is not a de Polignac number, because 66576005 - 2¹² = 66571909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 748001 + ... + 748089.

Almost surely, 2^66576005 is an apocalyptic number.

It is an amenable number.

66576005 is a deficient number, since it is larger than the sum of its proper divisors (16241713).

66576005 is an frugal number, since it uses more digits than its factorization.

66576005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 66576005 is about 8159.4120498967. The cubic root of 66576005 is about 405.2962421304.

The spelling of 66576005 in words is "sixty-six million, five hundred seventy-six thousand, five".