66021134 has 16 divisors (see below), whose sum is σ = 102698496. Its totient is φ = 31798200.

The previous prime is 66021133. The next prime is 66021173. The reversal of 66021134 is 43112066.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66021133) 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 7 ways as a sum of consecutive naturals, for example, 11729 + ... + 16419.

It is an arithmetic number, because the mean of its divisors is an integer number (6418656).

Almost surely, 2^66021134 is an apocalyptic number.

66021134 is a deficient number, since it is larger than the sum of its proper divisors (36677362).

66021134 is a wasteful number, since it uses less digits than its factorization.

66021134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66021134 is about 8125.3390083122. The cubic root of 66021134 is about 404.1671325936.

The spelling of 66021134 in words is "sixty-six million, twenty-one thousand, one hundred thirty-four".