666201396 has 48 divisors (see below), whose sum is σ = 1777954304. Its totient is φ = 190191456.

The previous prime is 666201379. The next prime is 666201413. The reversal of 666201396 is 693102666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666201379) and next prime (666201413).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142431 + ... + 147033.

Almost surely, 2^666201396 is an apocalyptic number.

It is an amenable number.

666201396 is an abundant number, since it is smaller than the sum of its proper divisors (1111752908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666201396 is a wasteful number, since it uses less digits than its factorization.

666201396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340 (or 6338 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 666201396 is about 25810.8774744293. The cubic root of 666201396 is about 873.3771917579.

The spelling of 666201396 in words is "six hundred sixty-six million, two hundred one thousand, three hundred ninety-six".