28911370066 has 4 divisors (see below), whose sum is σ = 43367055102. Its totient is φ = 14455685032.

The previous prime is 28911370027. The next prime is 28911370079. The reversal of 28911370066 is 66007311982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66007311982 = 2 ⋅33003655991.

It can be written as a sum of positive squares in only one way, i.e., 18521849025 + 10389521041 = 136095^2 + 101929^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7227842515 + ... + 7227842518.

Almost surely, 2^28911370066 is an apocalyptic number.

28911370066 is a deficient number, since it is larger than the sum of its proper divisors (14455685036).

28911370066 is a wasteful number, since it uses less digits than its factorization.

28911370066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14455685035.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 28911370066 in words is "twenty-eight billion, nine hundred eleven million, three hundred seventy thousand, sixty-six".