6620615249 has 2 divisors, whose sum is σ = 6620615250. Its totient is φ = 6620615248.

The previous prime is 6620615219. The next prime is 6620615279. The reversal of 6620615249 is 9425160266.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6620615219) and next prime (6620615279).

It can be written as a sum of positive squares in only one way, i.e., 6415209025 + 205406224 = 80095^2 + 14332^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620615249 - 2⁸ = 6620614993 is a prime.

It is not a weakly prime, because it can be changed into another prime (6620615219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310307624 + 3310307625.

It is an arithmetic number, because the mean of its divisors is an integer number (3310307625).

Almost surely, 2^6620615249 is an apocalyptic number.

It is an amenable number.

6620615249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620615249 is an equidigital number, since it uses as much as digits as its factorization.

6620615249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 6620615249 is about 81367.1632109661. The cubic root of 6620615249 is about 1877.7284365397.

The spelling of 6620615249 in words is "six billion, six hundred twenty million, six hundred fifteen thousand, two hundred forty-nine".