66506043 has 16 divisors (see below), whose sum is σ = 91842336. Its totient is φ = 42781440.

The previous prime is 66506029. The next prime is 66506047. The reversal of 66506043 is 34060566.

It is not a de Polignac number, because 66506043 - 2⁹ = 66505531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66506043.

It is not an unprimeable number, because it can be changed into a prime (66506047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6271 + ... + 13127.

It is an arithmetic number, because the mean of its divisors is an integer number (5740146).

Almost surely, 2^66506043 is an apocalyptic number.

66506043 is a deficient number, since it is larger than the sum of its proper divisors (25336293).

66506043 is a wasteful number, since it uses less digits than its factorization.

66506043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6974.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66506043 is about 8155.1237268358. The cubic root of 66506043 is about 405.1542226246.

The spelling of 66506043 in words is "sixty-six million, five hundred six thousand, forty-three".