16066521157 has 2 divisors, whose sum is σ = 16066521158. Its totient is φ = 16066521156.

The previous prime is 16066521091. The next prime is 16066521199. The reversal of 16066521157 is 75112566061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10176572641 + 5889948516 = 100879^2 + 76746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16066521157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16066528157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8033260578 + 8033260579.

It is an arithmetic number, because the mean of its divisors is an integer number (8033260579).

Almost surely, 2^16066521157 is an apocalyptic number.

It is an amenable number.

16066521157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16066521157 is an equidigital number, since it uses as much as digits as its factorization.

16066521157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 16066521157 in words is "sixteen billion, sixty-six million, five hundred twenty-one thousand, one hundred fifty-seven".