28278277066 has 32 divisors (see below), whose sum is σ = 47285683200. Its totient is φ = 12595184640.

The previous prime is 28278277057. The next prime is 28278277091. The reversal of 28278277066 is 66077287282.

It is a junction number, because it is equal to n+sod(n) for n = 28278276998 and 28278277016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240490 + ... + 338218.

It is an arithmetic number, because the mean of its divisors is an integer number (1477677600).

Almost surely, 2^28278277066 is an apocalyptic number.

28278277066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28278277066 is a deficient number, since it is larger than the sum of its proper divisors (19007406134).

28278277066 is a wasteful number, since it uses less digits than its factorization.

28278277066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98134.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 28278277066 in words is "twenty-eight billion, two hundred seventy-eight million, two hundred seventy-seven thousand, sixty-six".