16000660066 has 8 divisors (see below), whose sum is σ = 25412813100. Its totient is φ = 7529722368.

The previous prime is 16000660061. The next prime is 16000660069. The reversal of 16000660066 is 66006600061.

It can be written as a sum of positive squares in 2 ways, for example, as 15970640625 + 30019441 = 126375^2 + 5479^2 .

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

It is a super-2 number, since 2×16000660066² (a number of 21 digits) contains 22 as substring.

16000660066 is a modest number, since divided by 660066 gives 160 as remainder.

It is not an unprimeable number, because it can be changed into a prime (16000660061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235303791 + ... + 235303858.

Almost surely, 2^16000660066 is an apocalyptic number.

16000660066 is a deficient number, since it is larger than the sum of its proper divisors (9412153034).

16000660066 is a wasteful number, since it uses less digits than its factorization.

16000660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470607668.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 16000660066 in words is "sixteen billion, six hundred sixty thousand, sixty-six".