6666777 has 24 divisors (see below), whose sum is σ = 10920000. Its totient is φ = 3885408.

The previous prime is 6666769. The next prime is 6666791. The reversal of 6666777 is 7776666.

It is a happy number.

It is not a de Polignac number, because 6666777 - 2³ = 6666769 is a prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6666797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724 + ... + 3722.

It is an arithmetic number, because the mean of its divisors is an integer number (455000).

Almost surely, 2^6666777 is an apocalyptic number.

It is an amenable number.

6666777 is a deficient number, since it is larger than the sum of its proper divisors (4253223).

6666777 is a wasteful number, since it uses less digits than its factorization.

6666777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037 (or 3034 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 6666777 is about 2582.0102633413. The cubic root of 6666777 is about 188.2082440469.

The spelling of 6666777 in words is "six million, six hundred sixty-six thousand, seven hundred seventy-seven".