2006666677 has 4 divisors (see below), whose sum is σ = 2007417280. Its totient is φ = 2005916076.

The previous prime is 2006666639. The next prime is 2006666693. The reversal of 2006666677 is 7766666002.

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 a de Polignac number, because none of the positive numbers 2^k-2006666677 is a prime.

It is a super-2 number, since 2×2006666677² = 8053422305164444658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006606677) 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, 371277 + ... + 376642.

It is an arithmetic number, because the mean of its divisors is an integer number (501854320).

Almost surely, 2^2006666677 is an apocalyptic number.

It is an amenable number.

2006666677 is a deficient number, since it is larger than the sum of its proper divisors (750603).

2006666677 is an equidigital number, since it uses as much as digits as its factorization.

2006666677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750602.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 2006666677 is about 44795.8332548910. The cubic root of 2006666677 is about 1261.3194117536.

The spelling of 2006666677 in words is "two billion, six million, six hundred sixty-six thousand, six hundred seventy-seven".