66520795 has 8 divisors (see below), whose sum is σ = 87081840. Its totient is φ = 48378720.

The previous prime is 66520787. The next prime is 66520841. The reversal of 66520795 is 59702566.

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

It is not a de Polignac number, because 66520795 - 2³ = 66520787 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 604680 + ... + 604789.

It is an arithmetic number, because the mean of its divisors is an integer number (10885230).

Almost surely, 2^66520795 is an apocalyptic number.

66520795 is a deficient number, since it is larger than the sum of its proper divisors (20561045).

66520795 is a wasteful number, since it uses less digits than its factorization.

66520795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209485.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 66520795 is about 8156.0281387450. The cubic root of 66520795 is about 405.1841767609.

The spelling of 66520795 in words is "sixty-six million, five hundred twenty thousand, seven hundred ninety-five".