666852722 has 4 divisors (see below), whose sum is σ = 1000279086. Its totient is φ = 333426360.

The previous prime is 666852713. The next prime is 666852763. The reversal of 666852722 is 227258666.

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., 660952681 + 5900041 = 25709^2 + 2429^2 .

It is a super-3 number, since 3×666852722³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166713179 + ... + 166713182.

Almost surely, 2^666852722 is an apocalyptic number.

666852722 is a deficient number, since it is larger than the sum of its proper divisors (333426364).

666852722 is a wasteful number, since it uses less digits than its factorization.

666852722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333426363.

The product of its digits is 483840, while the sum is 44.

The square root of 666852722 is about 25823.4916694083. The cubic root of 666852722 is about 873.6617243297.

The spelling of 666852722 in words is "six hundred sixty-six million, eight hundred fifty-two thousand, seven hundred twenty-two".