427665277 has 16 divisors (see below), whose sum is σ = 500843952. Its totient is φ = 361497600.

The previous prime is 427665269. The next prime is 427665323. The reversal of 427665277 is 772566724.

It can be written as a sum of positive squares in 8 ways, for example, as 70795396 + 356869881 = 8414^2 + 18891^2 .

It is a cyclic number.

It is not a de Polignac number, because 427665277 - 2³ = 427665269 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 (427665257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17974 + ... + 34327.

It is an arithmetic number, because the mean of its divisors is an integer number (31302747).

Almost surely, 2^427665277 is an apocalyptic number.

It is an amenable number.

427665277 is a deficient number, since it is larger than the sum of its proper divisors (73178675).

427665277 is a wasteful number, since it uses less digits than its factorization.

427665277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52368.

The product of its digits is 987840, while the sum is 46.

The square root of 427665277 is about 20680.0695598443. The cubic root of 427665277 is about 753.4156956747.

The spelling of 427665277 in words is "four hundred twenty-seven million, six hundred sixty-five thousand, two hundred seventy-seven".