16255615066 has 4 divisors (see below), whose sum is σ = 24383422602. Its totient is φ = 8127807532.

The previous prime is 16255615031. The next prime is 16255615177. The reversal of 16255615066 is 66051655261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66051655261 = 45989 ⋅1436249.

It can be written as a sum of positive squares in only one way, i.e., 13727637225 + 2527977841 = 117165^2 + 50279^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4063903765 + ... + 4063903768.

Almost surely, 2^16255615066 is an apocalyptic number.

16255615066 is a deficient number, since it is larger than the sum of its proper divisors (8127807536).

16255615066 is an equidigital number, since it uses as much as digits as its factorization.

16255615066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8127807535.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 16255615066 in words is "sixteen billion, two hundred fifty-five million, six hundred fifteen thousand, sixty-six".