1055187666 has 36 divisors (see below), whose sum is σ = 2475639738. Its totient is φ = 324672192.

The previous prime is 1055187613. The next prime is 1055187673. The reversal of 1055187666 is 6667815501.

It can be written as a sum of positive squares in 3 ways, for example, as 836887041 + 218300625 = 28929^2 + 14775^2 .

It is a super-2 number, since 2×1055187666² = 2226842020957055112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 170395 + ... + 176478.

Almost surely, 2^1055187666 is an apocalyptic number.

1055187666 is an abundant number, since it is smaller than the sum of its proper divisors (1420452072).

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

1055187666 is a wasteful number, since it uses less digits than its factorization.

1055187666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346907 (or 346891 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 1055187666 is about 32483.6522884974. The cubic root of 1055187666 is about 1018.0674885749.

The spelling of 1055187666 in words is "one billion, fifty-five million, one hundred eighty-seven thousand, six hundred sixty-six".