66163620095 has 4 divisors (see below), whose sum is σ = 79396344120. Its totient is φ = 52930896072.

The previous prime is 66163620011. The next prime is 66163620119. The reversal of 66163620095 is 59002636166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59002636166 = 2 ⋅29501318083.

It is a cyclic number.

It is not a de Polignac number, because 66163620095 - 2¹⁶ = 66163554559 is a prime.

It is a congruent 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, 6616362005 + ... + 6616362014.

It is an arithmetic number, because the mean of its divisors is an integer number (19849086030).

Almost surely, 2^66163620095 is an apocalyptic number.

66163620095 is a deficient number, since it is larger than the sum of its proper divisors (13232724025).

66163620095 is a wasteful number, since it uses less digits than its factorization.

66163620095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13232724024.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 66163620095 in words is "sixty-six billion, one hundred sixty-three million, six hundred twenty thousand, ninety-five".