66091495 has 16 divisors (see below), whose sum is σ = 84801600. Its totient is φ = 49273344.

The previous prime is 66091463. The next prime is 66091511. The reversal of 66091495 is 59419066.

It is not a de Polignac number, because 66091495 - 2⁵ = 66091463 is a prime.

It is a super-2 number, since 2×66091495² = 8736171422670050, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4981 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (5300100).

Almost surely, 2^66091495 is an apocalyptic number.

66091495 is a deficient number, since it is larger than the sum of its proper divisors (18710105).

66091495 is a wasteful number, since it uses less digits than its factorization.

66091495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7674.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 66091495 is about 8129.6675823800. The cubic root of 66091495 is about 404.3106599035.

The spelling of 66091495 in words is "sixty-six million, ninety-one thousand, four hundred ninety-five".