66004771481 has 8 divisors (see below), whose sum is σ = 73079910624. Its totient is φ = 59108749920.

The previous prime is 66004771457. The next prime is 66004771507. The reversal of 66004771481 is 18417740066.

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

It is a de Polignac number, because none of the positive numbers 2^k-66004771481 is a prime.

It is a super-2 number, since 2×66004771481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66004771411) 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, 44778620 + ... + 44780093.

It is an arithmetic number, because the mean of its divisors is an integer number (9134988828).

Almost surely, 2^66004771481 is an apocalyptic number.

It is an amenable number.

66004771481 is a deficient number, since it is larger than the sum of its proper divisors (7075139143).

66004771481 is a wasteful number, since it uses less digits than its factorization.

66004771481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89558791.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 66004771481 in words is "sixty-six billion, four million, seven hundred seventy-one thousand, four hundred eighty-one".