10366551661 has 6 divisors (see below), whose sum is σ = 10510509930. Its totient is φ = 10224538848.

The previous prime is 10366551631. The next prime is 10366551673. The reversal of 10366551661 is 16615566301.

10366551661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 282576100 + 10083975561 = 16810^2 + 100419^2 .

It is not a de Polignac number, because 10366551661 - 2²¹ = 10364454509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10366551631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 967326 + ... + 977983.

It is an arithmetic number, because the mean of its divisors is an integer number (1751751655).

Almost surely, 2^10366551661 is an apocalyptic number.

It is an amenable number.

10366551661 is a deficient number, since it is larger than the sum of its proper divisors (143958269).

10366551661 is an frugal number, since it uses more digits than its factorization.

10366551661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945455 (or 1945382 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 10366551661 in words is "ten billion, three hundred sixty-six million, five hundred fifty-one thousand, six hundred sixty-one".