64677605 has 8 divisors (see below), whose sum is σ = 82178712. Its totient is φ = 48698368.

The previous prime is 64677589. The next prime is 64677611. The reversal of 64677605 is 50677646.

It can be written as a sum of positive squares in 4 ways, for example, as 35593156 + 29084449 = 5966^2 + 5393^2 .

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 64677605 - 2⁴ = 64677589 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 380372 + ... + 380541.

It is an arithmetic number, because the mean of its divisors is an integer number (10272339).

Almost surely, 2^64677605 is an apocalyptic number.

It is an amenable number.

64677605 is a deficient number, since it is larger than the sum of its proper divisors (17501107).

64677605 is a wasteful number, since it uses less digits than its factorization.

64677605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760935.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 64677605 is about 8042.2388052084. The cubic root of 64677605 is about 401.4067241022.

Adding to 64677605 its sum of digits (41), we get a palindrome (64677646).

The spelling of 64677605 in words is "sixty-four million, six hundred seventy-seven thousand, six hundred five".