66047173001 has 4 divisors (see below), whose sum is σ = 67129913604. Its totient is φ = 64964432400.

The previous prime is 66047172911. The next prime is 66047173007. The reversal of 66047173001 is 10037174066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10037174066 = 2 ⋅5018587033.

It can be written as a sum of positive squares in 2 ways, for example, as 34290150976 + 31757022025 = 185176^2 + 178205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66047173001 is a prime.

It is a super-2 number, since 2×66047173001² (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 (66047173007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541370210 + ... + 541370331.

It is an arithmetic number, because the mean of its divisors is an integer number (16782478401).

Almost surely, 2^66047173001 is an apocalyptic number.

66047173001 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66047173001 is a deficient number, since it is larger than the sum of its proper divisors (1082740603).

66047173001 is a wasteful number, since it uses less digits than its factorization.

66047173001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082740602.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 66047173001 in words is "sixty-six billion, forty-seven million, one hundred seventy-three thousand, one".