1012001665 has 8 divisors (see below), whose sum is σ = 1253576448. Its totient is φ = 783485040.

The previous prime is 1012001621. The next prime is 1012001681. The reversal of 1012001665 is 5661002101.

1012001665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1012001665 - 2⁷ = 1012001537 is a prime.

It is a Duffinian 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, 3264367 + ... + 3264676.

It is an arithmetic number, because the mean of its divisors is an integer number (156697056).

Almost surely, 2^1012001665 is an apocalyptic number.

It is an amenable number.

1012001665 is a deficient number, since it is larger than the sum of its proper divisors (241574783).

1012001665 is an equidigital number, since it uses as much as digits as its factorization.

1012001665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529079.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1012001665 is about 31811.9736105763. The cubic root of 1012001665 is about 1003.9846564244.

Adding to 1012001665 its reverse (5661002101), we get a palindrome (6673003766).

The spelling of 1012001665 in words is "one billion, twelve million, one thousand, six hundred sixty-five".