61043666323 has 4 divisors (see below), whose sum is σ = 61816371040. Its totient is φ = 60270961608.

The previous prime is 61043666309. The next prime is 61043666329. The reversal of 61043666323 is 32366634016.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61043666323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61043666329) 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, 386352240 + ... + 386352397.

It is an arithmetic number, because the mean of its divisors is an integer number (15454092760).

Almost surely, 2^61043666323 is an apocalyptic number.

61043666323 is a deficient number, since it is larger than the sum of its proper divisors (772704717).

61043666323 is an equidigital number, since it uses as much as digits as its factorization.

61043666323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772704716.

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 61043666323 in words is "sixty-one billion, forty-three million, six hundred sixty-six thousand, three hundred twenty-three".