1055666099 has 4 divisors (see below), whose sum is σ = 1057541736. Its totient is φ = 1053790464.

The previous prime is 1055666093. The next prime is 1055666141. The reversal of 1055666099 is 9906665501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1055666099 - 2¹⁶ = 1055600563 is a prime.

It is a super-2 number, since 2×1055666099² = 2228861825155755602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055666093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 936974 + ... + 938099.

It is an arithmetic number, because the mean of its divisors is an integer number (264385434).

Almost surely, 2^1055666099 is an apocalyptic number.

1055666099 is a deficient number, since it is larger than the sum of its proper divisors (1875637).

1055666099 is an equidigital number, since it uses as much as digits as its factorization.

1055666099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875636.

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 1055666099 is about 32491.0156658729. The cubic root of 1055666099 is about 1018.2213327683.

The spelling of 1055666099 in words is "one billion, fifty-five million, six hundred sixty-six thousand, ninety-nine".