6640177 has 4 divisors (see below), whose sum is σ = 6989680. Its totient is φ = 6290676.

The previous prime is 6640163. The next prime is 6640181. The reversal of 6640177 is 7710466.

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 6640177 - 2¹⁵ = 6607409 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640157) 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, 174723 + ... + 174760.

It is an arithmetic number, because the mean of its divisors is an integer number (1747420).

Almost surely, 2^6640177 is an apocalyptic number.

It is an amenable number.

6640177 is a deficient number, since it is larger than the sum of its proper divisors (349503).

6640177 is a wasteful number, since it uses less digits than its factorization.

6640177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349502.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 6640177 is about 2576.8540897769. The cubic root of 6640177 is about 187.9575975745.

The spelling of 6640177 in words is "six million, six hundred forty thousand, one hundred seventy-seven".