1553361966 has 24 divisors (see below), whose sum is σ = 3624511800. Its totient is φ = 477957456.

The previous prime is 1553361949. The next prime is 1553361989. The reversal of 1553361966 is 6691633551.

1553361966 is a `hidden beast` number, since 1 + 553 + 3 + 6 + 1 + 96 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3318916 + ... + 3319383.

It is an arithmetic number, because the mean of its divisors is an integer number (151021325).

Almost surely, 2^1553361966 is an apocalyptic number.

1553361966 is an abundant number, since it is smaller than the sum of its proper divisors (2071149834).

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

1553361966 is a wasteful number, since it uses less digits than its factorization.

1553361966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638320 (or 6638317 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 1553361966 is about 39412.7132534668. The cubic root of 1553361966 is about 1158.1306509590.

The spelling of 1553361966 in words is "one billion, five hundred fifty-three million, three hundred sixty-one thousand, nine hundred sixty-six".