16066549 has 2 divisors, whose sum is σ = 16066550. Its totient is φ = 16066548.

The previous prime is 16066543. The next prime is 16066553. The reversal of 16066549 is 94566061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15944049 + 122500 = 3993^2 + 350^2 .

It is an emirp because it is prime and its reverse (94566061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16066549 - 2³ = 16066541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16066541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8033274 + 8033275.

It is an arithmetic number, because the mean of its divisors is an integer number (8033275).

Almost surely, 2^16066549 is an apocalyptic number.

It is an amenable number.

16066549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16066549 is an equidigital number, since it uses as much as digits as its factorization.

16066549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 16066549 is about 4008.3099930020. The cubic root of 16066549 is about 252.3330870869. Note that the first 3 decimals are identical.

The spelling of 16066549 in words is "sixteen million, sixty-six thousand, five hundred forty-nine".