66951415966 has 8 divisors (see below), whose sum is σ = 101348474040. Its totient is φ = 33168591288.

The previous prime is 66951415961. The next prime is 66951415981.

66951415966 is nontrivially palindromic in base 10.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66951415966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66951415961) 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, 153558076 + ... + 153558511.

It is an arithmetic number, because the mean of its divisors is an integer number (12668559255).

Almost surely, 2^66951415966 is an apocalyptic number.

66951415966 is a deficient number, since it is larger than the sum of its proper divisors (34397058074).

66951415966 is a wasteful number, since it uses less digits than its factorization.

66951415966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307116698.

The product of its digits is 10497600, while the sum is 58.

The spelling of 66951415966 in words is "sixty-six billion, nine hundred fifty-one million, four hundred fifteen thousand, nine hundred sixty-six".