6626870161 has 2 divisors, whose sum is σ = 6626870162. Its totient is φ = 6626870160.

The previous prime is 6626870143. The next prime is 6626870167. The reversal of 6626870161 is 1610786266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6253646400 + 373223761 = 79080^2 + 19319^2 .

It is a cyclic number.

It is not a de Polignac number, because 6626870161 - 2¹¹ = 6626868113 is a prime.

It is not a weakly prime, because it can be changed into another prime (6626870167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3313435080 + 3313435081.

It is an arithmetic number, because the mean of its divisors is an integer number (3313435081).

Almost surely, 2^6626870161 is an apocalyptic number.

It is an amenable number.

6626870161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6626870161 is an equidigital number, since it uses as much as digits as its factorization.

6626870161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 6626870161 is about 81405.5904775587. The cubic root of 6626870161 is about 1878.3195864996.

The spelling of 6626870161 in words is "six billion, six hundred twenty-six million, eight hundred seventy thousand, one hundred sixty-one".