61660343 has 4 divisors (see below), whose sum is σ = 65287440. Its totient is φ = 58033248.

The previous prime is 61660331. The next prime is 61660363. The reversal of 61660343 is 34306616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61660343 - 2⁶ = 61660279 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 (61660363) 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 3 ways as a sum of consecutive naturals, for example, 1813523 + ... + 1813556.

It is an arithmetic number, because the mean of its divisors is an integer number (16321860).

Almost surely, 2^61660343 is an apocalyptic number.

61660343 is a deficient number, since it is larger than the sum of its proper divisors (3627097).

61660343 is a wasteful number, since it uses less digits than its factorization.

61660343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627096.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 61660343 is about 7852.4100122192. The cubic root of 61660343 is about 395.0650814091.

Adding to 61660343 its reverse (34306616), we get a palindrome (95966959).

The spelling of 61660343 in words is "sixty-one million, six hundred sixty thousand, three hundred forty-three".