1661088313 has 8 divisors (see below), whose sum is σ = 1750140288. Its totient is φ = 1573438944.

The previous prime is 1661088311. The next prime is 1661088329. The reversal of 1661088313 is 3138801661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1661088313 - 2¹ = 1661088311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1661088311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348220 + ... + 352957.

It is an arithmetic number, because the mean of its divisors is an integer number (218767536).

Almost surely, 2^1661088313 is an apocalyptic number.

It is an amenable number.

1661088313 is a deficient number, since it is larger than the sum of its proper divisors (89051975).

1661088313 is a wasteful number, since it uses less digits than its factorization.

1661088313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701303.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1661088313 is about 40756.4511826042. The cubic root of 1661088313 is about 1184.3068490458.

Adding to 1661088313 its reverse (3138801661), we get a palindrome (4799889974).

The spelling of 1661088313 in words is "one billion, six hundred sixty-one million, eighty-eight thousand, three hundred thirteen".