16527661 has 2 divisors, whose sum is σ = 16527662. Its totient is φ = 16527660.

The previous prime is 16527659. The next prime is 16527677. The reversal of 16527661 is 16672561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16080100 + 447561 = 4010^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 16527661 - 2¹ = 16527659 is a prime.

Together with 16527659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16527631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8263830 + 8263831.

It is an arithmetic number, because the mean of its divisors is an integer number (8263831).

Almost surely, 2^16527661 is an apocalyptic number.

It is an amenable number.

16527661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16527661 is an equidigital number, since it uses as much as digits as its factorization.

16527661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 16527661 is about 4065.4226102584. The cubic root of 16527661 is about 254.7243516324.

The spelling of 16527661 in words is "sixteen million, five hundred twenty-seven thousand, six hundred sixty-one".