666576061 has 4 divisors (see below), whose sum is σ = 670990624. Its totient is φ = 662161500.

The previous prime is 666576047. The next prime is 666576083. The reversal of 666576061 is 160675666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 666576061 - 2¹⁹ = 666051773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666575999 and 666576017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666576011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207055 + ... + 2207356.

It is an arithmetic number, because the mean of its divisors is an integer number (167747656).

Almost surely, 2^666576061 is an apocalyptic number.

It is an amenable number.

666576061 is a deficient number, since it is larger than the sum of its proper divisors (4414563).

666576061 is a wasteful number, since it uses less digits than its factorization.

666576061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414562.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 666576061 is about 25818.1343439064. The cubic root of 666576061 is about 873.5408872731.

The spelling of 666576061 in words is "six hundred sixty-six million, five hundred seventy-six thousand, sixty-one".