66446164450655 has 16 divisors (see below), whose sum is σ = 86987393869824. Its totient is φ = 48322636546080.

The previous prime is 66446164450639. The next prime is 66446164450661. The reversal of 66446164450655 is 55605446164466.

It is a happy number.

It is not a de Polignac number, because 66446164450655 - 2⁴ = 66446164450639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21630479 + ... + 24510608.

It is an arithmetic number, because the mean of its divisors is an integer number (5436712116864).

Almost surely, 2^{66446164450655} is an apocalyptic number.

66446164450655 is a deficient number, since it is larger than the sum of its proper divisors (20541229419169).

66446164450655 is a wasteful number, since it uses less digits than its factorization.

66446164450655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46167286.

The product of its (nonzero) digits is 248832000, while the sum is 62.

The spelling of 66446164450655 in words is "sixty-six trillion, four hundred forty-six billion, one hundred sixty-four million, four hundred fifty thousand, six hundred fifty-five".