64770117 has 4 divisors (see below), whose sum is σ = 86360160. Its totient is φ = 43180076.

The previous prime is 64770109. The next prime is 64770149. The reversal of 64770117 is 71107746.

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 64770117 - 2³ = 64770109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64770157) 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, 10795017 + ... + 10795022.

It is an arithmetic number, because the mean of its divisors is an integer number (21590040).

Almost surely, 2^64770117 is an apocalyptic number.

It is an amenable number.

64770117 is a deficient number, since it is larger than the sum of its proper divisors (21590043).

64770117 is a wasteful number, since it uses less digits than its factorization.

64770117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21590042.

The product of its (nonzero) digits is 8232, while the sum is 33.

The square root of 64770117 is about 8047.9883821984. The cubic root of 64770117 is about 401.5980177631.

The spelling of 64770117 in words is "sixty-four million, seven hundred seventy thousand, one hundred seventeen".