66649435 has 16 divisors (see below), whose sum is σ = 89143200. Its totient is φ = 47540736.

The previous prime is 66649433. The next prime is 66649439. The reversal of 66649435 is 53494666.

It is not a de Polignac number, because 66649435 - 2¹ = 66649433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66649391 and 66649400.

It is not an unprimeable number, because it can be changed into a prime (66649433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19020 + ... + 22249.

It is an arithmetic number, because the mean of its divisors is an integer number (5571450).

Almost surely, 2^66649435 is an apocalyptic number.

66649435 is a deficient number, since it is larger than the sum of its proper divisors (22493765).

66649435 is a wasteful number, since it uses less digits than its factorization.

66649435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41310.

The product of its digits is 466560, while the sum is 43.

The square root of 66649435 is about 8163.9105213127. The cubic root of 66649435 is about 405.4451945353.

The spelling of 66649435 in words is "sixty-six million, six hundred forty-nine thousand, four hundred thirty-five".