1150001615666 has 4 divisors (see below), whose sum is σ = 1725002423502. Its totient is φ = 575000807832.

The previous prime is 1150001615663. The next prime is 1150001615687. The reversal of 1150001615666 is 6665161000511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1140442447225 + 9559168441 = 1067915^2 + 97771^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1150001615663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287500403915 + ... + 287500403918.

Almost surely, 2^{1150001615666} is an apocalyptic number.

1150001615666 is a deficient number, since it is larger than the sum of its proper divisors (575000807836).

1150001615666 is an equidigital number, since it uses as much as digits as its factorization.

1150001615666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575000807835.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 1150001615666 in words is "one trillion, one hundred fifty billion, one million, six hundred fifteen thousand, six hundred sixty-six".