666201832 has 8 divisors (see below), whose sum is σ = 1249128450. Its totient is φ = 333100912.

The previous prime is 666201827. The next prime is 666201847. The reversal of 666201832 is 238102666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 340254916 + 325946916 = 18446^2 + 18054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41637607 + ... + 41637622.

Almost surely, 2^666201832 is an apocalyptic number.

It is an amenable number.

666201832 is a deficient number, since it is larger than the sum of its proper divisors (582926618).

666201832 is a wasteful number, since it uses less digits than its factorization.

666201832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83275235 (or 83275231 counting only the distinct ones).

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

The square root of 666201832 is about 25810.8859204794. The cubic root of 666201832 is about 873.3773822870.

The spelling of 666201832 in words is "six hundred sixty-six million, two hundred one thousand, eight hundred thirty-two".