66935214938 has 8 divisors (see below), whose sum is σ = 102851671860. Its totient is φ = 32651324320.

The previous prime is 66935214917. The next prime is 66935214947. The reversal of 66935214938 is 83941253966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66839312089 + 95902849 = 258533^2 + 9793^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408141473 + ... + 408141636.

Almost surely, 2^66935214938 is an apocalyptic number.

66935214938 is a deficient number, since it is larger than the sum of its proper divisors (35916456922).

66935214938 is a wasteful number, since it uses less digits than its factorization.

66935214938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816283152.

The product of its digits is 8398080, while the sum is 56.

The spelling of 66935214938 in words is "sixty-six billion, nine hundred thirty-five million, two hundred fourteen thousand, nine hundred thirty-eight".