66556214501 has 8 divisors (see below), whose sum is σ = 76279727424. Its totient is φ = 56886572160.

The previous prime is 66556214489. The next prime is 66556214507. The reversal of 66556214501 is 10541265566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66556214501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66556214507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13464995 + ... + 13469936.

It is an arithmetic number, because the mean of its divisors is an integer number (9534965928).

Almost surely, 2^66556214501 is an apocalyptic number.

It is an amenable number.

66556214501 is a deficient number, since it is larger than the sum of its proper divisors (9723512923).

66556214501 is a wasteful number, since it uses less digits than its factorization.

66556214501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26935291.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 66556214501 in words is "sixty-six billion, five hundred fifty-six million, two hundred fourteen thousand, five hundred one".