1666055001115 has 4 divisors (see below), whose sum is σ = 1999266001344. Its totient is φ = 1332844000888.

The previous prime is 1666055001101. The next prime is 1666055001197. The reversal of 1666055001115 is 5111005506661.

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 1666055001115 - 2¹³ = 1666054992923 is a prime.

It is a Duffinian 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, 166605500107 + ... + 166605500116.

It is an arithmetic number, because the mean of its divisors is an integer number (499816500336).

Almost surely, 2^{1666055001115} is an apocalyptic number.

1666055001115 is a deficient number, since it is larger than the sum of its proper divisors (333211000229).

1666055001115 is an equidigital number, since it uses as much as digits as its factorization.

1666055001115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333211000228.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 1666055001115 in words is "one trillion, six hundred sixty-six billion, fifty-five million, one thousand, one hundred fifteen".