66496405 has 8 divisors (see below), whose sum is σ = 81104184. Its totient is φ = 52324800.

The previous prime is 66496403. The next prime is 66496411. The reversal of 66496405 is 50469466.

It can be written as a sum of positive squares in 4 ways, for example, as 269361 + 66227044 = 519^2 + 8138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66496405 - 2¹ = 66496403 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 (66496403) 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, 108706 + ... + 109315.

It is an arithmetic number, because the mean of its divisors is an integer number (10138023).

Almost surely, 2^66496405 is an apocalyptic number.

It is an amenable number.

66496405 is a deficient number, since it is larger than the sum of its proper divisors (14607779).

66496405 is a wasteful number, since it uses less digits than its factorization.

66496405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218087.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 66496405 is about 8154.5327885784. The cubic root of 66496405 is about 405.1346501424.

The spelling of 66496405 in words is "sixty-six million, four hundred ninety-six thousand, four hundred five".