66630556157611 has 8 divisors (see below), whose sum is σ = 66868111566000. Its totient is φ = 66393003841920.

The previous prime is 66630556157609. The next prime is 66630556157629. The reversal of 66630556157611 is 11675165503666.

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

It is a cyclic number.

It is not a de Polignac number, because 66630556157611 - 2¹ = 66630556157609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66630556257611) 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, 47827660 + ... + 49201078.

It is an arithmetic number, because the mean of its divisors is an integer number (8358513945750).

Almost surely, 2^{66630556157611} is an apocalyptic number.

66630556157611 is a deficient number, since it is larger than the sum of its proper divisors (237555408389).

66630556157611 is a wasteful number, since it uses less digits than its factorization.

66630556157611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546349.

The product of its (nonzero) digits is 20412000, while the sum is 58.

The spelling of 66630556157611 in words is "sixty-six trillion, six hundred thirty billion, five hundred fifty-six million, one hundred fifty-seven thousand, six hundred eleven".