66571155488 has 12 divisors (see below), whose sum is σ = 131061962430. Its totient is φ = 33285577728.

The previous prime is 66571155487. The next prime is 66571155517. The reversal of 66571155488 is 88455117566.

It can be written as a sum of positive squares in only one way, i.e., 57747934864 + 8823220624 = 240308^2 + 93932^2 .

It is not an unprimeable number, because it can be changed into a prime (66571155481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040174273 + ... + 1040174336.

Almost surely, 2^66571155488 is an apocalyptic number.

It is an amenable number.

66571155488 is a deficient number, since it is larger than the sum of its proper divisors (64490806942).

66571155488 is a wasteful number, since it uses less digits than its factorization.

66571155488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080348619 (or 2080348611 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 56.

The spelling of 66571155488 in words is "sixty-six billion, five hundred seventy-one million, one hundred fifty-five thousand, four hundred eighty-eight".