66220556632 has 32 divisors (see below), whose sum is σ = 124949699280. Its totient is φ = 32900848000.

The previous prime is 66220556617. The next prime is 66220556653. The reversal of 66220556632 is 23665502266.

It is a congruent 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, 2718507 + ... + 2742757.

Almost surely, 2^66220556632 is an apocalyptic number.

It is an amenable number.

66220556632 is a deficient number, since it is larger than the sum of its proper divisors (58729142648).

66220556632 is a wasteful number, since it uses less digits than its factorization.

66220556632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26403 (or 26399 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 66220556632 in words is "sixty-six billion, two hundred twenty million, five hundred fifty-six thousand, six hundred thirty-two".