66044063461 has 4 divisors (see below), whose sum is σ = 66045615552. Its totient is φ = 66042511372.

The previous prime is 66044063447. The next prime is 66044063473. The reversal of 66044063461 is 16436044066.

66044063461 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66044063461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66044063431) 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, 710365 + ... + 797938.

It is an arithmetic number, because the mean of its divisors is an integer number (16511403888).

Almost surely, 2^66044063461 is an apocalyptic number.

It is an amenable number.

66044063461 is a deficient number, since it is larger than the sum of its proper divisors (1552091).

66044063461 is a wasteful number, since it uses less digits than its factorization.

66044063461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552090.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 66044063461 in words is "sixty-six billion, forty-four million, sixty-three thousand, four hundred sixty-one".