6625749 has 8 divisors (see below), whose sum is σ = 9513952. Its totient is φ = 4077360.

The previous prime is 6625747. The next prime is 6625769. The reversal of 6625749 is 9475266.

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

It is not a de Polignac number, because 6625749 - 2¹ = 6625747 is a prime.

It is a super-2 number, since 2×6625749² = 87801099622002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 169891 = 6625749 / (6 + 6 + 2 + 5 + 7 + 4 + 9).

It is a d-powerful number, because it can be written as 6³ + 6⁸ + 2²¹ + 5⁹ + 7⁷ + 4⁸ + 9⁴ .

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 (6625747) 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, 84907 + ... + 84984.

It is an arithmetic number, because the mean of its divisors is an integer number (1189244).

Almost surely, 2^6625749 is an apocalyptic number.

It is an amenable number.

6625749 is a deficient number, since it is larger than the sum of its proper divisors (2888203).

6625749 is a wasteful number, since it uses less digits than its factorization.

6625749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169907.

The product of its digits is 90720, while the sum is 39.

The square root of 6625749 is about 2574.0530297568. The cubic root of 6625749 is about 187.8213653262.

The spelling of 6625749 in words is "six million, six hundred twenty-five thousand, seven hundred forty-nine".