16466681939 has 8 divisors (see below), whose sum is σ = 17246507040. Its totient is φ = 15692180416.

The previous prime is 16466681927. The next prime is 16466681947. The reversal of 16466681939 is 93918666461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16466681939 - 2¹⁶ = 16466616403 is a prime.

It is a super-2 number, since 2×16466681939² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16466681039) 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 7 ways as a sum of consecutive naturals, for example, 1324562 + ... + 1336935.

It is an arithmetic number, because the mean of its divisors is an integer number (2155813380).

Almost surely, 2^16466681939 is an apocalyptic number.

16466681939 is a deficient number, since it is larger than the sum of its proper divisors (779825101).

16466681939 is a wasteful number, since it uses less digits than its factorization.

16466681939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661789.

The product of its digits is 10077696, while the sum is 59.

The spelling of 16466681939 in words is "sixteen billion, four hundred sixty-six million, six hundred eighty-one thousand, nine hundred thirty-nine".