6677921 has 2 divisors, whose sum is σ = 6677922. Its totient is φ = 6677920.

The previous prime is 6677903. The next prime is 6677941. The reversal of 6677921 is 1297766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5456896 + 1221025 = 2336^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 6677921 - 2²² = 2483617 is a prime.

It is not a weakly prime, because it can be changed into another prime (6677941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3338960 + 3338961.

It is an arithmetic number, because the mean of its divisors is an integer number (3338961).

Almost surely, 2^6677921 is an apocalyptic number.

It is an amenable number.

6677921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6677921 is an equidigital number, since it uses as much as digits as its factorization.

6677921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 6677921 is about 2584.1673707405. The cubic root of 6677921 is about 188.3130535677.

The spelling of 6677921 in words is "six million, six hundred seventy-seven thousand, nine hundred twenty-one".