66500343 has 24 divisors (see below), whose sum is σ = 118224288. Its totient is φ = 35076672.

The previous prime is 66500327. The next prime is 66500351. The reversal of 66500343 is 34300566.

66500343 is a `hidden beast` number, since 6 + 650 + 0 + 3 + 4 + 3 = 666.

It is not a de Polignac number, because 66500343 - 2⁴ = 66500327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500303) 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, 39780 + ... + 41417.

It is an arithmetic number, because the mean of its divisors is an integer number (4926012).

Almost surely, 2^66500343 is an apocalyptic number.

66500343 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66500343 is a deficient number, since it is larger than the sum of its proper divisors (51723945).

66500343 is a wasteful number, since it uses less digits than its factorization.

66500343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81223 (or 81220 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 66500343 is about 8154.7742458023. The cubic root of 66500343 is about 405.1426475108.

The spelling of 66500343 in words is "sixty-six million, five hundred thousand, three hundred forty-three".