6625537 has 4 divisors (see below), whose sum is σ = 6839296. Its totient is φ = 6411780.

The previous prime is 6625519. The next prime is 6625571. The reversal of 6625537 is 7355266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7355266 = 2 ⋅3677633.

It is a cyclic number.

It is not a de Polignac number, because 6625537 - 2¹⁵ = 6592769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6625237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106833 + ... + 106894.

It is an arithmetic number, because the mean of its divisors is an integer number (1709824).

Almost surely, 2^6625537 is an apocalyptic number.

It is an amenable number.

6625537 is a deficient number, since it is larger than the sum of its proper divisors (213759).

6625537 is a wasteful number, since it uses less digits than its factorization.

6625537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213758.

The product of its digits is 37800, while the sum is 34.

The square root of 6625537 is about 2574.0118492346. The cubic root of 6625537 is about 187.8193621034.

The spelling of 6625537 in words is "six million, six hundred twenty-five thousand, five hundred thirty-seven".