66091242 has 32 divisors (see below), whose sum is σ = 152985600. Its totient is φ = 18643248.

The previous prime is 66091237. The next prime is 66091309. The reversal of 66091242 is 24219066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6642 + ... + 13277.

It is an arithmetic number, because the mean of its divisors is an integer number (4780800).

Almost surely, 2^66091242 is an apocalyptic number.

66091242 is an abundant number, since it is smaller than the sum of its proper divisors (86894358).

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

66091242 is a wasteful number, since it uses less digits than its factorization.

66091242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20010.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66091242 is about 8129.6520220733. The cubic root of 66091242 is about 404.3101439988.

The spelling of 66091242 in words is "sixty-six million, ninety-one thousand, two hundred forty-two".