1661352339 has 8 divisors (see below), whose sum is σ = 2223372240. Its totient is φ = 1103450336.

The previous prime is 1661352331. The next prime is 1661352347. The reversal of 1661352339 is 9332531661.

It is an interprime number because it is at equal distance from previous prime (1661352331) and next prime (1661352347).

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 1661352339 - 2³ = 1661352331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1661352297 and 1661352306.

It is not an unprimeable number, because it can be changed into a prime (1661352331) 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, 1028532 + ... + 1030145.

It is an arithmetic number, because the mean of its divisors is an integer number (277921530).

Almost surely, 2^1661352339 is an apocalyptic number.

1661352339 is a deficient number, since it is larger than the sum of its proper divisors (562019901).

1661352339 is a wasteful number, since it uses less digits than its factorization.

1661352339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058949.

The product of its digits is 87480, while the sum is 39.

The square root of 1661352339 is about 40759.6901239448. The cubic root of 1661352339 is about 1184.3695932985.

The spelling of 1661352339 in words is "one billion, six hundred sixty-one million, three hundred fifty-two thousand, three hundred thirty-nine".