666422116 has 6 divisors (see below), whose sum is σ = 1166238710. Its totient is φ = 333211056.

The previous prime is 666422101. The next prime is 666422137. The reversal of 666422116 is 611224666.

It can be written as a sum of positive squares in only one way, i.e., 658127716 + 8294400 = 25654^2 + 2880^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83302761 + ... + 83302768.

Almost surely, 2^666422116 is an apocalyptic number.

It is an amenable number.

666422116 is a deficient number, since it is larger than the sum of its proper divisors (499816594).

666422116 is a wasteful number, since it uses less digits than its factorization.

666422116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166605533 (or 166605531 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 666422116 is about 25815.1528370451. The cubic root of 666422116 is about 873.4736343300.

The spelling of 666422116 in words is "six hundred sixty-six million, four hundred twenty-two thousand, one hundred sixteen".