1010038661 has 4 divisors (see below), whose sum is σ = 1021387500. Its totient is φ = 998689824.

The previous prime is 1010038637. The next prime is 1010038669. The reversal of 1010038661 is 1668300101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 443313025 + 566725636 = 21055^2 + 23806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010038661 - 2⁶ = 1010038597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1010038661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010038669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5674286 + ... + 5674463.

It is an arithmetic number, because the mean of its divisors is an integer number (255346875).

Almost surely, 2^1010038661 is an apocalyptic number.

It is an amenable number.

1010038661 is a deficient number, since it is larger than the sum of its proper divisors (11348839).

1010038661 is an equidigital number, since it uses as much as digits as its factorization.

1010038661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11348838.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1010038661 is about 31781.1054087173. The cubic root of 1010038661 is about 1003.3350851751.

Adding to 1010038661 its reverse (1668300101), we get a palindrome (2678338762).

The spelling of 1010038661 in words is "one billion, ten million, thirty-eight thousand, six hundred sixty-one".