64680827 has 4 divisors (see below), whose sum is σ = 64727520. Its totient is φ = 64634136.

The previous prime is 64680797. The next prime is 64680841. The reversal of 64680827 is 72808646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64680827 - 2¹⁴ = 64664443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64680877) 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 3 ways as a sum of consecutive naturals, for example, 21203 + ... + 24060.

It is an arithmetic number, because the mean of its divisors is an integer number (16181880).

Almost surely, 2^64680827 is an apocalyptic number.

64680827 is a deficient number, since it is larger than the sum of its proper divisors (46693).

64680827 is a wasteful number, since it uses less digits than its factorization.

64680827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46692.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 64680827 is about 8042.4391200680. The cubic root of 64680827 is about 401.4133895262.

The spelling of 64680827 in words is "sixty-four million, six hundred eighty thousand, eight hundred twenty-seven".