66624463545 has 8 divisors (see below), whose sum is σ = 106599141696. Its totient is φ = 35533047216.

The previous prime is 66624463537. The next prime is 66624463627. The reversal of 66624463545 is 54536442666.

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

It is not a de Polignac number, because 66624463545 - 2³ = 66624463537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220815437 + ... + 2220815466.

It is an arithmetic number, because the mean of its divisors is an integer number (13324892712).

Almost surely, 2^66624463545 is an apocalyptic number.

It is an amenable number.

66624463545 is a deficient number, since it is larger than the sum of its proper divisors (39974678151).

66624463545 is a wasteful number, since it uses less digits than its factorization.

66624463545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441630911.

The product of its digits is 12441600, while the sum is 51.

The spelling of 66624463545 in words is "sixty-six billion, six hundred twenty-four million, four hundred sixty-three thousand, five hundred forty-five".