66436349 has 16 divisors (see below), whose sum is σ = 78432000. Its totient is φ = 55085184.

The previous prime is 66436313. The next prime is 66436373. The reversal of 66436349 is 94363466.

It is a happy number.

It is not a de Polignac number, because 66436349 - 2²⁴ = 49659133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66436399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50897 + ... + 52185.

It is an arithmetic number, because the mean of its divisors is an integer number (4902000).

Almost surely, 2^66436349 is an apocalyptic number.

It is an amenable number.

66436349 is a deficient number, since it is larger than the sum of its proper divisors (11995651).

66436349 is a wasteful number, since it uses less digits than its factorization.

66436349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 279936, while the sum is 41.

The square root of 66436349 is about 8150.8495876197. The cubic root of 66436349 is about 405.0126480834.

The spelling of 66436349 in words is "sixty-six million, four hundred thirty-six thousand, three hundred forty-nine".