1000666115655 has 8 divisors (see below), whose sum is σ = 1601065785072. Its totient is φ = 533688595008.

The previous prime is 1000666115573. The next prime is 1000666115671. The reversal of 1000666115655 is 5565116660001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000666115655 - 2¹⁰ = 1000666114631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33355537174 + ... + 33355537203.

It is an arithmetic number, because the mean of its divisors is an integer number (200133223134).

Almost surely, 2^{1000666115655} is an apocalyptic number.

1000666115655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000666115655 is a deficient number, since it is larger than the sum of its proper divisors (600399669417).

1000666115655 is an equidigital number, since it uses as much as digits as its factorization.

1000666115655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66711074385.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 1000666115655 in words is "one trillion, six hundred sixty-six million, one hundred fifteen thousand, six hundred fifty-five".