66954445966 has 8 divisors (see below), whose sum is σ = 100435944024. Its totient is φ = 33475797960.

The previous prime is 66954445937. The next prime is 66954445967.

It is a happy number.

66954445966 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×66954445966² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66954445898 and 66954445907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66954445967) 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, 652780 + ... + 748351.

It is an arithmetic number, because the mean of its divisors is an integer number (12554493003).

Almost surely, 2^66954445966 is an apocalyptic number.

66954445966 is a deficient number, since it is larger than the sum of its proper divisors (33481498058).

66954445966 is a wasteful number, since it uses less digits than its factorization.

66954445966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425026.

The product of its digits is 167961600, while the sum is 64.

The spelling of 66954445966 in words is "sixty-six billion, nine hundred fifty-four million, four hundred forty-five thousand, nine hundred sixty-six".