1011660666015 has 16 divisors (see below), whose sum is σ = 1618751766528. Its totient is φ = 539520788256.

The previous prime is 1011660666013. The next prime is 1011660666053. The reversal of 1011660666015 is 5106660661101.

It is not a de Polignac number, because 1011660666015 - 2¹ = 1011660666013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011660666011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1706847 + ... + 2221856.

It is an arithmetic number, because the mean of its divisors is an integer number (101171985408).

Almost surely, 2^{1011660666015} is an apocalyptic number.

1011660666015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1011660666015 is a deficient number, since it is larger than the sum of its proper divisors (607091100513).

1011660666015 is a wasteful number, since it uses less digits than its factorization.

1011660666015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945878.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 1011660666015 in words is "one trillion, eleven billion, six hundred sixty million, six hundred sixty-six thousand, fifteen".