16677202406666 has 4 divisors (see below), whose sum is σ = 25015803610002. Its totient is φ = 8338601203332.

The previous prime is 16677202406639. The next prime is 16677202406671. The reversal of 16677202406666 is 66660420277661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12769151826025 + 3908050580641 = 3573395^2 + 1976879^2 .

It is a super-2 number, since 2×16677202406666² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4169300601665 + ... + 4169300601668.

Almost surely, 2^{16677202406666} is an apocalyptic number.

16677202406666 is a deficient number, since it is larger than the sum of its proper divisors (8338601203336).

16677202406666 is an equidigital number, since it uses as much as digits as its factorization.

16677202406666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338601203335.

The product of its (nonzero) digits is 36578304, while the sum is 59.

The spelling of 16677202406666 in words is "sixteen trillion, six hundred seventy-seven billion, two hundred two million, four hundred six thousand, six hundred sixty-six".