1208115666 has 24 divisors (see below), whose sum is σ = 2634924864. Its totient is φ = 400037400.

The previous prime is 1208115661. The next prime is 1208115673. The reversal of 1208115666 is 6665118021.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1208115666.

It is not an unprimeable number, because it can be changed into a prime (1208115661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219526 + ... + 224961.

It is an arithmetic number, because the mean of its divisors is an integer number (109788536).

Almost surely, 2^1208115666 is an apocalyptic number.

1208115666 is an abundant number, since it is smaller than the sum of its proper divisors (1426809198).

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

1208115666 is a wasteful number, since it uses less digits than its factorization.

1208115666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444646 (or 444643 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1208115666 is about 34757.9583117306. The cubic root of 1208115666 is about 1065.0487949607.

The spelling of 1208115666 in words is "one billion, two hundred eight million, one hundred fifteen thousand, six hundred sixty-six".