66417747080 has 32 divisors (see below), whose sum is σ = 149469197400. Its totient is φ = 26561895936.

The previous prime is 66417747079. The next prime is 66417747107. The reversal of 66417747080 is 8074771466.

It can be written as a sum of positive squares in 4 ways, for example, as 61219625476 + 5198121604 = 247426^2 + 72098^2 .

It is a super-2 number, since 2×66417747080² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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, 47564 + ... + 367556.

Almost surely, 2^66417747080 is an apocalyptic number.

It is an amenable number.

66417747080 is an abundant number, since it is smaller than the sum of its proper divisors (83051450320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66417747080 is a wasteful number, since it uses less digits than its factorization.

66417747080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325193 (or 325189 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 66417747080 in words is "sixty-six billion, four hundred seventeen million, seven hundred forty-seven thousand, eighty".