10660061021 has 4 divisors (see below), whose sum is σ = 11287123452. Its totient is φ = 10032998592.

The previous prime is 10660061003. The next prime is 10660061033. The reversal of 10660061021 is 12016006601.

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 9169020025 + 1491040996 = 95755^2 + 38614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10660061021 is a prime.

It is a super-2 number, since 2×10660061021² (a number of 21 digits) contains 22 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 (10660091021) 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, 313531190 + ... + 313531223.

It is an arithmetic number, because the mean of its divisors is an integer number (2821780863).

Almost surely, 2^10660061021 is an apocalyptic number.

It is an amenable number.

10660061021 is a deficient number, since it is larger than the sum of its proper divisors (627062431).

10660061021 is an equidigital number, since it uses as much as digits as its factorization.

10660061021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627062430.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 10660061021 its reverse (12016006601), we get a palindrome (22676067622).

The spelling of 10660061021 in words is "ten billion, six hundred sixty million, sixty-one thousand, twenty-one".