66840197037 has 8 divisors (see below), whose sum is σ = 89209655136. Its totient is φ = 44515435152.

The previous prime is 66840197003. The next prime is 66840197051. The reversal of 66840197037 is 73079104866.

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

It is not a de Polignac number, because 66840197037 - 2⁷ = 66840196909 is a prime.

It is a super-2 number, since 2×66840197037² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66840997037) 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, 11170563 + ... + 11176544.

It is an arithmetic number, because the mean of its divisors is an integer number (11151206892).

Almost surely, 2^66840197037 is an apocalyptic number.

It is an amenable number.

66840197037 is a deficient number, since it is larger than the sum of its proper divisors (22369458099).

66840197037 is a wasteful number, since it uses less digits than its factorization.

66840197037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22348107.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 66840197037 in words is "sixty-six billion, eight hundred forty million, one hundred ninety-seven thousand, thirty-seven".