6656001 has 16 divisors (see below), whose sum is σ = 9782208. Its totient is φ = 3992000.

The previous prime is 6655997. The next prime is 6656003. The reversal of 6656001 is 1006566.

It is a cyclic number.

It is not a de Polignac number, because 6656001 - 2² = 6655997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6656003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2335 + ... + 4331.

It is an arithmetic number, because the mean of its divisors is an integer number (611388).

It is a Proth number, since it is equal to 1625 ⋅ 2¹² + 1 and 1625 < 2¹².

Almost surely, 2^6656001 is an apocalyptic number.

It is an amenable number.

6656001 is a deficient number, since it is larger than the sum of its proper divisors (3126207).

6656001 is a wasteful number, since it uses less digits than its factorization.

6656001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 6656001 is about 2579.9226732598. The cubic root of 6656001 is about 188.1067844381.

It can be divided in two parts, 665 and 6001, that added together give a palindrome (6666).

The spelling of 6656001 in words is "six million, six hundred fifty-six thousand, one".