66911714 has 4 divisors (see below), whose sum is σ = 100367574. Its totient is φ = 33455856.

The previous prime is 66911699. The next prime is 66911737. The reversal of 66911714 is 41711966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41711966 = 2 ⋅20855983.

It can be written as a sum of positive squares in only one way, i.e., 55249489 + 11662225 = 7433^2 + 3415^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16727927 + ... + 16727930.

Almost surely, 2^66911714 is an apocalyptic number.

66911714 is a deficient number, since it is larger than the sum of its proper divisors (33455860).

66911714 is a wasteful number, since it uses less digits than its factorization.

66911714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33455859.

The product of its digits is 9072, while the sum is 35.

The square root of 66911714 is about 8179.9580683522. The cubic root of 66911714 is about 405.9763346961.

The spelling of 66911714 in words is "sixty-six million, nine hundred eleven thousand, seven hundred fourteen".