66006436 has 12 divisors (see below), whose sum is σ = 119494620. Its totient is φ = 31865120.

The previous prime is 66006431. The next prime is 66006449. The reversal of 66006436 is 63460066.

It can be written as a sum of positive squares in 2 ways, for example, as 15681600 + 50324836 = 3960^2 + 7094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66006398 and 66006407.

It is not an unprimeable number, because it can be changed into a prime (66006431) 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, 284395 + ... + 284626.

It is an arithmetic number, because the mean of its divisors is an integer number (9957885).

Almost surely, 2^66006436 is an apocalyptic number.

It is an amenable number.

66006436 is a deficient number, since it is larger than the sum of its proper divisors (53488184).

66006436 is a wasteful number, since it uses less digits than its factorization.

66006436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569054 (or 569052 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 66006436 is about 8124.4345033978. The cubic root of 66006436 is about 404.1371377064.

The spelling of 66006436 in words is "sixty-six million, six thousand, four hundred thirty-six".