66512043 has 16 divisors (see below), whose sum is σ = 106116640. Its totient is φ = 40930272.

The previous prime is 66512029. The next prime is 66512063. The reversal of 66512043 is 34021566.

66512043 is a `hidden beast` number, since 6 + 651 + 2 + 0 + 4 + 3 = 666.

It is not a de Polignac number, because 66512043 - 2⁵ = 66512011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66511998 and 66512016.

It is not an unprimeable number, because it can be changed into a prime (66512063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94396 + ... + 95097.

It is an arithmetic number, because the mean of its divisors is an integer number (6632290).

Almost surely, 2^66512043 is an apocalyptic number.

66512043 is a deficient number, since it is larger than the sum of its proper divisors (39604597).

66512043 is a wasteful number, since it uses less digits than its factorization.

66512043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189515 (or 189509 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66512043 is about 8155.4915854288. The cubic root of 66512043 is about 405.1664062405.

The spelling of 66512043 in words is "sixty-six million, five hundred twelve thousand, forty-three".