66444495 has 32 divisors (see below), whose sum is σ = 115433472. Its totient is φ = 32441472.

The previous prime is 66444491. The next prime is 66444529. The reversal of 66444495 is 59444466.

It is not a de Polignac number, because 66444495 - 2² = 66444491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66444491) 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 31 ways as a sum of consecutive naturals, for example, 23424 + ... + 26106.

It is an arithmetic number, because the mean of its divisors is an integer number (3607296).

Almost surely, 2^66444495 is an apocalyptic number.

66444495 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66444495 is a deficient number, since it is larger than the sum of its proper divisors (48988977).

66444495 is a wasteful number, since it uses less digits than its factorization.

66444495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its digits is 414720, while the sum is 42.

The square root of 66444495 is about 8151.3492748133. The cubic root of 66444495 is about 405.0292007600.

The spelling of 66444495 in words is "sixty-six million, four hundred forty-four thousand, four hundred ninety-five".