66738095 has 4 divisors (see below), whose sum is σ = 80085720. Its totient is φ = 53390472.

The previous prime is 66738079. The next prime is 66738101. The reversal of 66738095 is 59083766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66738095 - 2⁴ = 66738079 is a prime.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6673805 + ... + 6673814.

It is an arithmetic number, because the mean of its divisors is an integer number (20021430).

Almost surely, 2^66738095 is an apocalyptic number.

66738095 is a deficient number, since it is larger than the sum of its proper divisors (13347625).

66738095 is a wasteful number, since it uses less digits than its factorization.

66738095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13347624.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 66738095 is about 8169.3387125275. The cubic root of 66738095 is about 405.6248952004.

The spelling of 66738095 in words is "sixty-six million, seven hundred thirty-eight thousand, ninety-five".