1155666051 has 48 divisors (see below), whose sum is σ = 1789409440. Its totient is φ = 718626816.

The previous prime is 1155666047. The next prime is 1155666059. The reversal of 1155666051 is 1506665511.

It is not a de Polignac number, because 1155666051 - 2² = 1155666047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155665997 and 1155666015.

It is not an unprimeable number, because it can be changed into a prime (1155666059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5987811 + ... + 5988003.

Almost surely, 2^1155666051 is an apocalyptic number.

1155666051 is a deficient number, since it is larger than the sum of its proper divisors (633743389).

1155666051 is an equidigital number, since it uses as much as digits as its factorization.

1155666051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1155666051 is about 33995.0886305654. The cubic root of 1155666051 is about 1049.4073907704.

The spelling of 1155666051 in words is "one billion, one hundred fifty-five million, six hundred sixty-six thousand, fifty-one".