64777271 has 8 divisors (see below), whose sum is σ = 72166080. Its totient is φ = 57732192.

The previous prime is 64777261. The next prime is 64777301. The reversal of 64777271 is 17277746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64777271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64777201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85535 + ... + 86288.

It is an arithmetic number, because the mean of its divisors is an integer number (9020760).

Almost surely, 2^64777271 is an apocalyptic number.

64777271 is a deficient number, since it is larger than the sum of its proper divisors (7388809).

64777271 is a wasteful number, since it uses less digits than its factorization.

64777271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171865.

The product of its digits is 115248, while the sum is 41.

The square root of 64777271 is about 8048.4328288183. The cubic root of 64777271 is about 401.6128030096.

The spelling of 64777271 in words is "sixty-four million, seven hundred seventy-seven thousand, two hundred seventy-one".