66530895 has 16 divisors (see below), whose sum is σ = 107106432. Its totient is φ = 35264160.

The previous prime is 66530887. The next prime is 66530903. The reversal of 66530895 is 59803566.

It is an interprime number because it is at equal distance from previous prime (66530887) and next prime (66530903).

It is not a de Polignac number, because 66530895 - 2³ = 66530887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11161 + ... + 16050.

It is an arithmetic number, because the mean of its divisors is an integer number (6694152).

Almost surely, 2^66530895 is an apocalyptic number.

66530895 is a deficient number, since it is larger than the sum of its proper divisors (40575537).

66530895 is a wasteful number, since it uses less digits than its factorization.

66530895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27382.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 66530895 is about 8156.6472891746. The cubic root of 66530895 is about 405.2046823942.

The spelling of 66530895 in words is "sixty-six million, five hundred thirty thousand, eight hundred ninety-five".