66451456524 has 12 divisors (see below), whose sum is σ = 155053398584. Its totient is φ = 22150485504.

The previous prime is 66451456469. The next prime is 66451456559. The reversal of 66451456524 is 42565415466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×66451456524² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2768810677 + ... + 2768810700.

Almost surely, 2^66451456524 is an apocalyptic number.

It is an amenable number.

66451456524 is an abundant number, since it is smaller than the sum of its proper divisors (88601942060).

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

66451456524 is a wasteful number, since it uses less digits than its factorization.

66451456524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5537621384 (or 5537621382 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 48.

The spelling of 66451456524 in words is "sixty-six billion, four hundred fifty-one million, four hundred fifty-six thousand, five hundred twenty-four".