712271666 has 4 divisors (see below), whose sum is σ = 1068407502. Its totient is φ = 356135832.

The previous prime is 712271653. The next prime is 712271671. The reversal of 712271666 is 666172217.

712271666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 563065441 + 149206225 = 23729^2 + 12215^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178067915 + ... + 178067918.

Almost surely, 2^712271666 is an apocalyptic number.

712271666 is a deficient number, since it is larger than the sum of its proper divisors (356135836).

712271666 is a wasteful number, since it uses less digits than its factorization.

712271666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356135835.

The product of its digits is 42336, while the sum is 38.

The square root of 712271666 is about 26688.4181996611. The cubic root of 712271666 is about 893.0625739118.

The spelling of 712271666 in words is "seven hundred twelve million, two hundred seventy-one thousand, six hundred sixty-six".