6687401 has 8 divisors (see below), whose sum is σ = 7690944. Its totient is φ = 5695920.

The previous prime is 6687391. The next prime is 6687427. The reversal of 6687401 is 1047866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6687401 - 2¹⁴ = 6671017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6687451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1790 + ... + 4071.

It is an arithmetic number, because the mean of its divisors is an integer number (961368).

Almost surely, 2^6687401 is an apocalyptic number.

It is an amenable number.

6687401 is a deficient number, since it is larger than the sum of its proper divisors (1003543).

6687401 is a wasteful number, since it uses less digits than its factorization.

6687401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6031.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 6687401 is about 2586.0009667438. Note that the first 3 decimals coincide. The cubic root of 6687401 is about 188.4021213904.

The spelling of 6687401 in words is "six million, six hundred eighty-seven thousand, four hundred one".