6651249 has 24 divisors (see below), whose sum is σ = 9920736. Its totient is φ = 3960000.

The previous prime is 6651223. The next prime is 6651251. The reversal of 6651249 is 9421566.

It is not a de Polignac number, because 6651249 - 2⁵ = 6651217 is a prime.

It is a super-2 number, since 2×6651249² = 88478226520002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26374 + ... + 26624.

It is an arithmetic number, because the mean of its divisors is an integer number (413364).

Almost surely, 2^6651249 is an apocalyptic number.

It is an amenable number.

6651249 is a deficient number, since it is larger than the sum of its proper divisors (3269487).

6651249 is a wasteful number, since it uses less digits than its factorization.

6651249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 338 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 6651249 is about 2579.0015509883. The cubic root of 6651249 is about 188.0620079899.

It can be divided in two parts, 66 and 51249, that added together give a palindrome (51315).

The spelling of 6651249 in words is "six million, six hundred fifty-one thousand, two hundred forty-nine".