64782785 has 8 divisors (see below), whose sum is σ = 78174720. Its totient is φ = 51535984.

The previous prime is 64782749. The next prime is 64782803. The reversal of 64782785 is 58728746.

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 64782785 - 2¹² = 64778689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35297 + ... + 37086.

It is an arithmetic number, because the mean of its divisors is an integer number (9771840).

Almost surely, 2^64782785 is an apocalyptic number.

It is an amenable number.

64782785 is a deficient number, since it is larger than the sum of its proper divisors (13391935).

64782785 is a wasteful number, since it uses less digits than its factorization.

64782785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72567.

The product of its digits is 752640, while the sum is 47.

The square root of 64782785 is about 8048.7753726887. The cubic root of 64782785 is about 401.6241981082.

The spelling of 64782785 in words is "sixty-four million, seven hundred eighty-two thousand, seven hundred eighty-five".