66091095 has 24 divisors (see below), whose sum is σ = 130923936. Its totient is φ = 30212928.

The previous prime is 66091079. The next prime is 66091099. The reversal of 66091095 is 59019066.

It is not a de Polignac number, because 66091095 - 2⁴ = 66091079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66091099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104592 + ... + 105221.

It is an arithmetic number, because the mean of its divisors is an integer number (5455164).

Almost surely, 2^66091095 is an apocalyptic number.

66091095 is a deficient number, since it is larger than the sum of its proper divisors (64832841).

66091095 is a wasteful number, since it uses less digits than its factorization.

66091095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209831 (or 209828 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 66091095 is about 8129.6429810909. The cubic root of 66091095 is about 404.3098442433.

The spelling of 66091095 in words is "sixty-six million, ninety-one thousand, ninety-five".