1666059095 has 4 divisors (see below), whose sum is σ = 1999270920. Its totient is φ = 1332847272.

The previous prime is 1666059089. The next prime is 1666059103. The reversal of 1666059095 is 5909506661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5909506661 = 787 ⋅7508903.

It is a cyclic number.

It is not a de Polignac number, because 1666059095 - 2⁴ = 1666059079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166605905 + ... + 166605914.

It is an arithmetic number, because the mean of its divisors is an integer number (499817730).

Almost surely, 2^1666059095 is an apocalyptic number.

1666059095 is a deficient number, since it is larger than the sum of its proper divisors (333211825).

1666059095 is an equidigital number, since it uses as much as digits as its factorization.

1666059095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333211824.

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

The square root of 1666059095 is about 40817.3871652755. The cubic root of 1666059095 is about 1185.4870128136.

The spelling of 1666059095 in words is "one billion, six hundred sixty-six million, fifty-nine thousand, ninety-five".