66577229185 has 8 divisors (see below), whose sum is σ = 80144704296. Its totient is φ = 53093763840.

The previous prime is 66577229179. The next prime is 66577229233. The reversal of 66577229185 is 58192277566.

It can be written as a sum of positive squares in 4 ways, for example, as 11209727376 + 55367501809 = 105876^2 + 235303^2 .

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

It is not a de Polignac number, because 66577229185 - 2⁷ = 66577229057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21000696 + ... + 21003865.

It is an arithmetic number, because the mean of its divisors is an integer number (10018088037).

Almost surely, 2^66577229185 is an apocalyptic number.

It is an amenable number.

66577229185 is a deficient number, since it is larger than the sum of its proper divisors (13567475111).

66577229185 is a wasteful number, since it uses less digits than its factorization.

66577229185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42004883.

The product of its digits is 12700800, while the sum is 58.

The spelling of 66577229185 in words is "sixty-six billion, five hundred seventy-seven million, two hundred twenty-nine thousand, one hundred eighty-five".