66765382946 has 4 divisors (see below), whose sum is σ = 100148074422. Its totient is φ = 33382691472.

The previous prime is 66765382897. The next prime is 66765382969. The reversal of 66765382946 is 64928356766.

It is a happy number.

66765382946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54375244225 + 12390138721 = 233185^2 + 111311^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16691345735 + ... + 16691345738.

Almost surely, 2^66765382946 is an apocalyptic number.

66765382946 is a deficient number, since it is larger than the sum of its proper divisors (33382691476).

66765382946 is a wasteful number, since it uses less digits than its factorization.

66765382946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33382691475.

The product of its digits is 78382080, while the sum is 62.

The spelling of 66765382946 in words is "sixty-six billion, seven hundred sixty-five million, three hundred eighty-two thousand, nine hundred forty-six".