6625961 has 4 divisors (see below), whose sum is σ = 6700500. Its totient is φ = 6551424.

The previous prime is 6625943. The next prime is 6625979. The reversal of 6625961 is 1695266.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6625943) and next prime (6625979).

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 5851561 = 880^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 6625961 - 2¹⁸ = 6363817 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6625921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37136 + ... + 37313.

It is an arithmetic number, because the mean of its divisors is an integer number (1675125).

Almost surely, 2^6625961 is an apocalyptic number.

It is an amenable number.

6625961 is a deficient number, since it is larger than the sum of its proper divisors (74539).

6625961 is an equidigital number, since it uses as much as digits as its factorization.

6625961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74538.

The product of its digits is 19440, while the sum is 35.

The square root of 6625961 is about 2574.0942096202. The cubic root of 6625961 is about 187.8233685062.

The spelling of 6625961 in words is "six million, six hundred twenty-five thousand, nine hundred sixty-one".