16506051266 has 8 divisors (see below), whose sum is σ = 24787182924. Its totient is φ = 8243656960.

The previous prime is 16506051259. The next prime is 16506051299. The reversal of 16506051266 is 66215060561.

It can be written as a sum of positive squares in 2 ways, for example, as 13962967225 + 2543084041 = 118165^2 + 50429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4682135 + ... + 4685658.

Almost surely, 2^16506051266 is an apocalyptic number.

16506051266 is a deficient number, since it is larger than the sum of its proper divisors (8281131658).

16506051266 is an equidigital number, since it uses as much as digits as its factorization.

16506051266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9368676.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 16506051266 in words is "sixteen billion, five hundred six million, fifty-one thousand, two hundred sixty-six".