65381777066 has 8 divisors (see below), whose sum is σ = 98118436224. Its totient is φ = 32675631660.

The previous prime is 65381777063. The next prime is 65381777081. The reversal of 65381777066 is 66077718356.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65381777063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7623080 + ... + 7631651.

It is an arithmetic number, because the mean of its divisors is an integer number (12264804528).

Almost surely, 2^65381777066 is an apocalyptic number.

65381777066 is a deficient number, since it is larger than the sum of its proper divisors (32736659158).

65381777066 is a wasteful number, since it uses less digits than its factorization.

65381777066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15256876.

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 65381777066 in words is "sixty-five billion, three hundred eighty-one million, seven hundred seventy-seven thousand, sixty-six".