66499895548 has 12 divisors (see below), whose sum is σ = 116379743760. Its totient is φ = 33248540192.

The previous prime is 66499895521. The next prime is 66499895549. The reversal of 66499895548 is 84559899466.

It is a super-2 number, since 2×66499895548² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66499895549) 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, 241768 + ... + 437551.

It is an arithmetic number, because the mean of its divisors is an integer number (9698311980).

Almost surely, 2^66499895548 is an apocalyptic number.

It is an amenable number.

66499895548 is a deficient number, since it is larger than the sum of its proper divisors (49879848212).

66499895548 is a wasteful number, since it uses less digits than its factorization.

66499895548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703796 (or 703794 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 73.

The spelling of 66499895548 in words is "sixty-six billion, four hundred ninety-nine million, eight hundred ninety-five thousand, five hundred forty-eight".