66001505 has 8 divisors (see below), whose sum is σ = 79247400. Its totient is φ = 52770816.

The previous prime is 66001447. The next prime is 66001541. The reversal of 66001505 is 50510066.

It can be written as a sum of positive squares in 4 ways, for example, as 8832784 + 57168721 = 2972^2 + 7561^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66001505 - 2⁸ = 66001249 is a prime.

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, 10991 + ... + 15899.

It is an arithmetic number, because the mean of its divisors is an integer number (9905925).

Almost surely, 2^66001505 is an apocalyptic number.

It is an amenable number.

66001505 is a deficient number, since it is larger than the sum of its proper divisors (13245895).

66001505 is a wasteful number, since it uses less digits than its factorization.

66001505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 66001505 is about 8124.1310304549. The cubic root of 66001505 is about 404.1270737895.

The spelling of 66001505 in words is "sixty-six million, one thousand, five hundred five".