65400344066 has 4 divisors (see below), whose sum is σ = 98100516102. Its totient is φ = 32700172032.

The previous prime is 65400344029. The next prime is 65400344069. The reversal of 65400344066 is 66044300456.

It is a happy number.

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., 42612932041 + 22787412025 = 206429^2 + 150955^2 .

It is not an unprimeable number, because it can be changed into a prime (65400344069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16350086015 + ... + 16350086018.

Almost surely, 2^65400344066 is an apocalyptic number.

65400344066 is a deficient number, since it is larger than the sum of its proper divisors (32700172036).

65400344066 is a wasteful number, since it uses less digits than its factorization.

65400344066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32700172035.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 65400344066 in words is "sixty-five billion, four hundred million, three hundred forty-four thousand, sixty-six".