6661277 has 12 divisors (see below), whose sum is σ = 7803360. Its totient is φ = 5568696.

The previous prime is 6661273. The next prime is 6661279. The reversal of 6661277 is 7721666.

It is not a de Polignac number, because 6661277 - 2² = 6661273 is a prime.

It is a super-2 number, since 2×6661277² = 88745222541458, 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 (6661273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52388 + ... + 52514.

It is an arithmetic number, because the mean of its divisors is an integer number (650280).

Almost surely, 2^6661277 is an apocalyptic number.

It is an amenable number.

6661277 is a deficient number, since it is larger than the sum of its proper divisors (1142083).

6661277 is an equidigital number, since it uses as much as digits as its factorization.

6661277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 193 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 6661277 is about 2580.9449819785. The cubic root of 6661277 is about 188.1564733970.

The spelling of 6661277 in words is "six million, six hundred sixty-one thousand, two hundred seventy-seven".