64706505 has 16 divisors (see below), whose sum is σ = 109620864. Its totient is φ = 32480000.

The previous prime is 64706503. The next prime is 64706513. The reversal of 64706505 is 50560746.

It is not a de Polignac number, because 64706505 - 2¹ = 64706503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64706501) by changing a digit.

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, 126621 + ... + 127130.

It is an arithmetic number, because the mean of its divisors is an integer number (6851304).

Almost surely, 2^64706505 is an apocalyptic number.

It is an amenable number.

64706505 is a deficient number, since it is larger than the sum of its proper divisors (44914359).

64706505 is a wasteful number, since it uses less digits than its factorization.

64706505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253776.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 64706505 is about 8044.0353678984. The cubic root of 64706505 is about 401.4665022737.

The spelling of 64706505 in words is "sixty-four million, seven hundred six thousand, five hundred five".