66600042 has 24 divisors (see below), whose sum is σ = 139249824. Its totient is φ = 21233784.

The previous prime is 66600029. The next prime is 66600049. The reversal of 66600042 is 24000666.

It is a junction number, because it is equal to n+sod(n) for n = 66599985 and 66600021.

It is not an unprimeable number, because it can be changed into a prime (66600049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7318 + ... + 13665.

It is an arithmetic number, because the mean of its divisors is an integer number (5802076).

Almost surely, 2^66600042 is an apocalyptic number.

66600042 is an abundant number, since it is smaller than the sum of its proper divisors (72649782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66600042 is a wasteful number, since it uses less digits than its factorization.

66600042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21034 (or 21011 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 66600042 is about 8160.8848784920. The cubic root of 66600042 is about 405.3450131231.

The spelling of 66600042 in words is "sixty-six million, six hundred thousand, forty-two".