64684477 has 16 divisors (see below), whose sum is σ = 76684608. Its totient is φ = 53786880.

The previous prime is 64684463. The next prime is 64684481. The reversal of 64684477 is 77448646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64684477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64684777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14158 + ... + 18160.

It is an arithmetic number, because the mean of its divisors is an integer number (4792788).

Almost surely, 2^64684477 is an apocalyptic number.

It is an amenable number.

64684477 is a deficient number, since it is larger than the sum of its proper divisors (12000131).

64684477 is a wasteful number, since it uses less digits than its factorization.

64684477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140.

The product of its digits is 903168, while the sum is 46.

The square root of 64684477 is about 8042.6660380747. Note that the first 3 decimals coincide. The cubic root of 64684477 is about 401.4209400961.

The spelling of 64684477 in words is "sixty-four million, six hundred eighty-four thousand, four hundred seventy-seven".