66662436765 has 8 divisors (see below), whose sum is σ = 106659898848. Its totient is φ = 35553299600.

The previous prime is 66662436749. The next prime is 66662436769. The reversal of 66662436765 is 56763426666.

It is a happy number.

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

It is not a de Polignac number, because 66662436765 - 2⁴ = 66662436749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66662436769) 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 7 ways as a sum of consecutive naturals, for example, 2222081211 + ... + 2222081240.

It is an arithmetic number, because the mean of its divisors is an integer number (13332487356).

Almost surely, 2^66662436765 is an apocalyptic number.

It is an amenable number.

66662436765 is a deficient number, since it is larger than the sum of its proper divisors (39997462083).

66662436765 is a wasteful number, since it uses less digits than its factorization.

66662436765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444162459.

The product of its digits is 39191040, while the sum is 57.

The spelling of 66662436765 in words is "sixty-six billion, six hundred sixty-two million, four hundred thirty-six thousand, seven hundred sixty-five".