6671949 has 4 divisors (see below), whose sum is σ = 8895936. Its totient is φ = 4447964.

The previous prime is 6671947. The next prime is 6671957. The reversal of 6671949 is 9491766.

6671949 = 857² + 858² + ... + 865².

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 6671949 - 2¹ = 6671947 is a prime.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6671949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6671947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111989 + ... + 1111994.

It is an arithmetic number, because the mean of its divisors is an integer number (2223984).

Almost surely, 2^6671949 is an apocalyptic number.

It is an amenable number.

6671949 is a deficient number, since it is larger than the sum of its proper divisors (2223987).

6671949 is a wasteful number, since it uses less digits than its factorization.

6671949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223986.

The product of its digits is 81648, while the sum is 42.

The square root of 6671949 is about 2583.0116143757. The cubic root of 6671949 is about 188.2569013129.

The spelling of 6671949 in words is "six million, six hundred seventy-one thousand, nine hundred forty-nine".