1555650066 has 16 divisors (see below), whose sum is σ = 3112717824. Its totient is φ = 518313744.

The previous prime is 1555650037. The next prime is 1555650073. The reversal of 1555650066 is 6600565551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44530 + ... + 71373.

It is an arithmetic number, because the mean of its divisors is an integer number (194544864).

Almost surely, 2^1555650066 is an apocalyptic number.

1555650066 is an abundant number, since it is smaller than the sum of its proper divisors (1557067758).

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

1555650066 is a wasteful number, since it uses less digits than its factorization.

1555650066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118145.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 1555650066 is about 39441.7300076962. The cubic root of 1555650066 is about 1158.6990135933.

The spelling of 1555650066 in words is "one billion, five hundred fifty-five million, six hundred fifty thousand, sixty-six".