1228926666 has 16 divisors (see below), whose sum is σ = 2681294688. Its totient is φ = 372402000.

The previous prime is 1228926653. The next prime is 1228926683. The reversal of 1228926666 is 6666298221.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 9309985 + ... + 9310116.

It is an arithmetic number, because the mean of its divisors is an integer number (167580918).

Almost surely, 2^1228926666 is an apocalyptic number.

1228926666 is an abundant number, since it is smaller than the sum of its proper divisors (1452368022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1228926666 is a wasteful number, since it uses less digits than its factorization.

1228926666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18620117.

The product of its digits is 746496, while the sum is 48.

The square root of 1228926666 is about 35056.0503479784. The cubic root of 1228926666 is about 1071.1295219894.

The spelling of 1228926666 in words is "one billion, two hundred twenty-eight million, nine hundred twenty-six thousand, six hundred sixty-six".