64671611 has 16 divisors (see below), whose sum is σ = 71500800. Its totient is φ = 58255200.

The previous prime is 64671589. The next prime is 64671631. The reversal of 64671611 is 11617646.

It is a happy number.

It is not a de Polignac number, because 64671611 - 2⁶ = 64671547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64671631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33821 + ... + 35681.

It is an arithmetic number, because the mean of its divisors is an integer number (4468800).

Almost surely, 2^64671611 is an apocalyptic number.

64671611 is a deficient number, since it is larger than the sum of its proper divisors (6829189).

64671611 is a wasteful number, since it uses less digits than its factorization.

64671611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its digits is 6048, while the sum is 32.

The square root of 64671611 is about 8041.8661391495. The cubic root of 64671611 is about 401.3943235902.

The spelling of 64671611 in words is "sixty-four million, six hundred seventy-one thousand, six hundred eleven".