66159895 has 8 divisors (see below), whose sum is σ = 79918560. Its totient is φ = 52576800.

The previous prime is 66159857. The next prime is 66159901. The reversal of 66159895 is 59895166.

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

It is not a de Polignac number, because 66159895 - 2¹⁹ = 65635607 is a prime.

It is a super-2 number, since 2×66159895² = 8754263412822050, which contains 22 as substring.

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, 43060 + ... + 44569.

It is an arithmetic number, because the mean of its divisors is an integer number (9989820).

Almost surely, 2^66159895 is an apocalyptic number.

66159895 is a deficient number, since it is larger than the sum of its proper divisors (13758665).

66159895 is a wasteful number, since it uses less digits than its factorization.

66159895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87785.

The product of its digits is 583200, while the sum is 49.

The square root of 66159895 is about 8133.8733085781. The cubic root of 66159895 is about 404.4500894138.

The spelling of 66159895 in words is "sixty-six million, one hundred fifty-nine thousand, eight hundred ninety-five".