66736673667 has 12 divisors (see below), whose sum is σ = 97133277384. Its totient is φ = 44151488160.

The previous prime is 66736673629. The next prime is 66736673687. The reversal of 66736673667 is 76637663766.

66736673667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66736673667 - 2⁷ = 66736673539 is a prime.

It is a super-2 number, since 2×66736673667² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66736673687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28301058 + ... + 28303415.

It is an arithmetic number, because the mean of its divisors is an integer number (8094439782).

Almost surely, 2^66736673667 is an apocalyptic number.

66736673667 is a deficient number, since it is larger than the sum of its proper divisors (30396603717).

66736673667 is a wasteful number, since it uses less digits than its factorization.

66736673667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56604610 (or 56604607 counting only the distinct ones).

The product of its digits is 144027072, while the sum is 63.

Subtracting 66736673667 from its reverse (76637663766), we obtain a palindrome (9900990099).

The spelling of 66736673667 in words is "sixty-six billion, seven hundred thirty-six million, six hundred seventy-three thousand, six hundred sixty-seven".