66791695 has 8 divisors (see below), whose sum is σ = 80642736. Its totient is φ = 53104896.

The previous prime is 66791663. The next prime is 66791719. The reversal of 66791695 is 59619766.

66791695 is nontrivially palindromic in base 3.

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

It is a cyclic number.

It is not a de Polignac number, because 66791695 - 2⁵ = 66791663 is a prime.

It is a super-2 number, since 2×66791695² = 8922261041946050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40162 + ... + 41791.

It is an arithmetic number, because the mean of its divisors is an integer number (10080342).

Almost surely, 2^66791695 is an apocalyptic number.

66791695 is a deficient number, since it is larger than the sum of its proper divisors (13851041).

66791695 is a wasteful number, since it uses less digits than its factorization.

66791695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82121.

The product of its digits is 612360, while the sum is 49.

The square root of 66791695 is about 8172.6186133944. The cubic root of 66791695 is about 405.7334572668.

The spelling of 66791695 in words is "sixty-six million, seven hundred ninety-one thousand, six hundred ninety-five".