64678705 has 16 divisors (see below), whose sum is σ = 95526144. Its totient is φ = 40939200.

The previous prime is 64678699. The next prime is 64678723. The reversal of 64678705 is 50787646.

It is not a de Polignac number, because 64678705 - 2⁵ = 64678673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70621 + ... + 71530.

It is an arithmetic number, because the mean of its divisors is an integer number (5970384).

Almost surely, 2^64678705 is an apocalyptic number.

64678705 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64678705 is a deficient number, since it is larger than the sum of its proper divisors (30847439).

64678705 is a wasteful number, since it uses less digits than its factorization.

64678705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142176.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 64678705 is about 8042.3071938344. The cubic root of 64678705 is about 401.4089997218.

The spelling of 64678705 in words is "sixty-four million, six hundred seventy-eight thousand, seven hundred five".