666227701 has 8 divisors (see below), whose sum is σ = 692777880. Its totient is φ = 639916032.

The previous prime is 666227693. The next prime is 666227707. The reversal of 666227701 is 107722666.

It can be written as a sum of positive squares in 4 ways, for example, as 77000625 + 589227076 = 8775^2 + 24274^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 666227701 - 2³ = 666227693 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 (666227707) 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, 53920 + ... + 65113.

It is an arithmetic number, because the mean of its divisors is an integer number (86597235).

Almost surely, 2^666227701 is an apocalyptic number.

It is an amenable number.

666227701 is a deficient number, since it is larger than the sum of its proper divisors (26550179).

666227701 is a wasteful number, since it uses less digits than its factorization.

666227701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119255.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 666227701 is about 25811.3870413816. The cubic root of 666227701 is about 873.3886867226.

The spelling of 666227701 in words is "six hundred sixty-six million, two hundred twenty-seven thousand, seven hundred one".