1036006661 has 4 divisors (see below), whose sum is σ = 1038274092. Its totient is φ = 1033739232.

The previous prime is 1036006633. The next prime is 1036006663. The reversal of 1036006661 is 1666006301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1666006301 = 193 ⋅8632157.

It can be written as a sum of positive squares in 2 ways, for example, as 585930436 + 450076225 = 24206^2 + 21215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1036006661 - 2¹⁸ = 1035744517 is a prime.

It is a super-3 number, since 3×1036006661³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1036006663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1133030 + ... + 1133943.

It is an arithmetic number, because the mean of its divisors is an integer number (259568523).

Almost surely, 2^1036006661 is an apocalyptic number.

It is an amenable number.

1036006661 is a deficient number, since it is larger than the sum of its proper divisors (2267431).

1036006661 is an equidigital number, since it uses as much as digits as its factorization.

1036006661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267430.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1036006661 is about 32187.0573522961. The cubic root of 1036006661 is about 1011.8609812449.

The spelling of 1036006661 in words is "one billion, thirty-six million, six thousand, six hundred sixty-one".