1350766661 has 4 divisors (see below), whose sum is σ = 1353775500. Its totient is φ = 1347757824.

The previous prime is 1350766649. The next prime is 1350766667. The reversal of 1350766661 is 1666670531.

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 619064161 + 731702500 = 24881^2 + 27050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1350766661 - 2⁶ = 1350766597 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 (1350766667) 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, 1503746 + ... + 1504643.

It is an arithmetic number, because the mean of its divisors is an integer number (338443875).

Almost surely, 2^1350766661 is an apocalyptic number.

It is an amenable number.

1350766661 is a deficient number, since it is larger than the sum of its proper divisors (3008839).

1350766661 is an equidigital number, since it uses as much as digits as its factorization.

1350766661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008838.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 1350766661 is about 36752.7775957138. Note that the first 3 decimals coincide. The cubic root of 1350766661 is about 1105.4186250576.

The spelling of 1350766661 in words is "one billion, three hundred fifty million, seven hundred sixty-six thousand, six hundred sixty-one".