1353016661 has 4 divisors (see below), whose sum is σ = 1375197324. Its totient is φ = 1330836000.

The previous prime is 1353016649. The next prime is 1353016667. The reversal of 1353016661 is 1666103531.

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 712623025 + 640393636 = 26695^2 + 25306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353016661 - 2¹⁰ = 1353015637 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 (1353016667) 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, 11090240 + ... + 11090361.

It is an arithmetic number, because the mean of its divisors is an integer number (343799331).

Almost surely, 2^1353016661 is an apocalyptic number.

It is an amenable number.

1353016661 is a deficient number, since it is larger than the sum of its proper divisors (22180663).

1353016661 is an equidigital number, since it uses as much as digits as its factorization.

1353016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22180662.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 1353016661 is about 36783.3747907937. The cubic root of 1353016661 is about 1106.0320574798.

The spelling of 1353016661 in words is "one billion, three hundred fifty-three million, sixteen thousand, six hundred sixty-one".