66534603011 has 4 divisors (see below), whose sum is σ = 66616644024. Its totient is φ = 66452562000.

The previous prime is 66534602999. The next prime is 66534603029. The reversal of 66534603011 is 11030643566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66534603011 is a prime.

It is a super-2 number, since 2×66534603011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66534603911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41019290 + ... + 41020911.

It is an arithmetic number, because the mean of its divisors is an integer number (16654161006).

Almost surely, 2^66534603011 is an apocalyptic number.

66534603011 is a deficient number, since it is larger than the sum of its proper divisors (82041013).

66534603011 is an equidigital number, since it uses as much as digits as its factorization.

66534603011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82041012.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 66534603011 in words is "sixty-six billion, five hundred thirty-four million, six hundred three thousand, eleven".