661202343 has 24 divisors (see below), whose sum is σ = 969259200. Its totient is φ = 434294784.

The previous prime is 661202341. The next prime is 661202351. The reversal of 661202343 is 343202166.

661202343 is a `hidden beast` number, since 6 + 612 + 0 + 2 + 3 + 43 = 666.

It is not a de Polignac number, because 661202343 - 2¹ = 661202341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661202341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207063 + ... + 210231.

It is an arithmetic number, because the mean of its divisors is an integer number (40385800).

Almost surely, 2^661202343 is an apocalyptic number.

661202343 is a deficient number, since it is larger than the sum of its proper divisors (308056857).

661202343 is a wasteful number, since it uses less digits than its factorization.

661202343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 661202343 is about 25713.8550785369. The cubic root of 661202343 is about 871.1871506515.

It can be divided in two parts, 6612023 and 43, that added together give a triangular number (6612066 = T₃₆₃₆).

The spelling of 661202343 in words is "six hundred sixty-one million, two hundred two thousand, three hundred forty-three".