15661650227 has 2 divisors, whose sum is σ = 15661650228. Its totient is φ = 15661650226.

The previous prime is 15661650139. The next prime is 15661650283. The reversal of 15661650227 is 72205616651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15661650227 - 2¹⁰ = 15661649203 is a prime.

It is not a weakly prime, because it can be changed into another prime (15661650127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7830825113 + 7830825114.

It is an arithmetic number, because the mean of its divisors is an integer number (7830825114).

Almost surely, 2^15661650227 is an apocalyptic number.

15661650227 is a deficient number, since it is larger than the sum of its proper divisors (1).

15661650227 is an equidigital number, since it uses as much as digits as its factorization.

15661650227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 15661650227 in words is "fifteen billion, six hundred sixty-one million, six hundred fifty thousand, two hundred twenty-seven".