10001660166615 has 32 divisors (see below), whose sum is σ = 17250509336256. Its totient is φ = 4919071518720.

The previous prime is 10001660166611. The next prime is 10001660166647. The reversal of 10001660166615 is 51666106610001.

It is not a de Polignac number, because 10001660166615 - 2² = 10001660166611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001660166611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24918714 + ... + 25316903.

It is an arithmetic number, because the mean of its divisors is an integer number (539078416758).

Almost surely, 2^{10001660166615} is an apocalyptic number.

10001660166615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10001660166615 is a deficient number, since it is larger than the sum of its proper divisors (7248849169641).

10001660166615 is a wasteful number, since it uses less digits than its factorization.

10001660166615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50236659.

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

Adding to 10001660166615 its reverse (51666106610001), we get a palindrome (61667766776616).

The spelling of 10001660166615 in words is "ten trillion, one billion, six hundred sixty million, one hundred sixty-six thousand, six hundred fifteen".