6668901 has 6 divisors (see below), whose sum is σ = 9632870. Its totient is φ = 4445928.

The previous prime is 6668899. The next prime is 6668903. The reversal of 6668901 is 1098666.

It is an interprime number because it is at equal distance from previous prime (6668899) and next prime (6668903).

It can be written as a sum of positive squares in only one way, i.e., 3896676 + 2772225 = 1974^2 + 1665^2 .

It is not a de Polignac number, because 6668901 - 2¹ = 6668899 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370486 + ... + 370503.

Almost surely, 2^6668901 is an apocalyptic number.

It is an amenable number.

6668901 is a deficient number, since it is larger than the sum of its proper divisors (2963969).

6668901 is a wasteful number, since it uses less digits than its factorization.

6668901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740995 (or 740992 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6668901 is about 2582.4215380143. The cubic root of 6668901 is about 188.2282293094.

It can be divided in two parts, 6668 and 901, that added together give a square (7569 = 87²).

The spelling of 6668901 in words is "six million, six hundred sixty-eight thousand, nine hundred one".