16662449777 has 8 divisors (see below), whose sum is σ = 17068557600. Its totient is φ = 16260465184.

The previous prime is 16662449743. The next prime is 16662449789. The reversal of 16662449777 is 77794426661.

16662449777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16662449777 - 2²⁰ = 16661401201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16662449737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022627 + ... + 1038792.

It is an arithmetic number, because the mean of its divisors is an integer number (2133569700).

Almost surely, 2^16662449777 is an apocalyptic number.

It is an amenable number.

16662449777 is a deficient number, since it is larger than the sum of its proper divisors (406107823).

16662449777 is a wasteful number, since it uses less digits than its factorization.

16662449777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061615.

The product of its digits is 21337344, while the sum is 59.

The spelling of 16662449777 in words is "sixteen billion, six hundred sixty-two million, four hundred forty-nine thousand, seven hundred seventy-seven".