64695617 has 4 divisors (see below), whose sum is σ = 73937856. Its totient is φ = 55453380.

The previous prime is 64695611. The next prime is 64695629. The reversal of 64695617 is 71659646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64695617 - 2⁴ = 64695601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64695611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4621109 + ... + 4621122.

It is an arithmetic number, because the mean of its divisors is an integer number (18484464).

Almost surely, 2^64695617 is an apocalyptic number.

It is an amenable number.

64695617 is a deficient number, since it is larger than the sum of its proper divisors (9242239).

64695617 is an equidigital number, since it uses as much as digits as its factorization.

64695617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9242238.

The product of its digits is 272160, while the sum is 44.

The square root of 64695617 is about 8043.3585646793. The cubic root of 64695617 is about 401.4439830928.

The spelling of 64695617 in words is "sixty-four million, six hundred ninety-five thousand, six hundred seventeen".