64612705 has 8 divisors (see below), whose sum is σ = 77641704. Its totient is φ = 51619200.

The previous prime is 64612697. The next prime is 64612739. The reversal of 64612705 is 50721646.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4875264 + 59737441 = 2208^2 + 7729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64612705 - 2³ = 64612697 is a prime.

It is a Duffinian number.

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, 4686 + ... + 12295.

It is an arithmetic number, because the mean of its divisors is an integer number (9705213).

Almost surely, 2^64612705 is an apocalyptic number.

It is an amenable number.

64612705 is a deficient number, since it is larger than the sum of its proper divisors (13028999).

64612705 is a wasteful number, since it uses less digits than its factorization.

64612705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17747.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 64612705 is about 8038.2028464079. The cubic root of 64612705 is about 401.2724168465.

The spelling of 64612705 in words is "sixty-four million, six hundred twelve thousand, seven hundred five".