6621551059 has 2 divisors, whose sum is σ = 6621551060. Its totient is φ = 6621551058.

The previous prime is 6621550997. The next prime is 6621551077. The reversal of 6621551059 is 9501551266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6621551059 - 2⁹ = 6621550547 is a prime.

It is not a weakly prime, because it can be changed into another prime (6621551089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310775529 + 3310775530.

It is an arithmetic number, because the mean of its divisors is an integer number (3310775530).

Almost surely, 2^6621551059 is an apocalyptic number.

6621551059 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621551059 is an equidigital number, since it uses as much as digits as its factorization.

6621551059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 6621551059 is about 81372.9135462163. The cubic root of 6621551059 is about 1877.8169033562.

The spelling of 6621551059 in words is "six billion, six hundred twenty-one million, five hundred fifty-one thousand, fifty-nine".