661000244353143 has 4 divisors (see below), whose sum is σ = 881333659137528. Its totient is φ = 440666829568760.

The previous prime is 661000244353109. The next prime is 661000244353199. The reversal of 661000244353143 is 341353442000166.

661000244353143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 661000244353143 - 2⁸ = 661000244352887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661000244353095 and 661000244353104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661000244353643) 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, 110166707392188 + ... + 110166707392193.

It is an arithmetic number, because the mean of its divisors is an integer number (220333414784382).

Almost surely, 2^{661000244353143} is an apocalyptic number.

661000244353143 is a deficient number, since it is larger than the sum of its proper divisors (220333414784385).

661000244353143 is a wasteful number, since it uses less digits than its factorization.

661000244353143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220333414784384.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 661000244353143 in words is "six hundred sixty-one trillion, two hundred forty-four million, three hundred fifty-three thousand, one hundred forty-three".