666783372 has 24 divisors (see below), whose sum is σ = 1573311600. Its totient is φ = 219763456.

The previous prime is 666783331. The next prime is 666783373. The reversal of 666783372 is 273387666.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (666783373) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 311097 + ... + 313232.

It is an arithmetic number, because the mean of its divisors is an integer number (65554650).

Almost surely, 2^666783372 is an apocalyptic number.

It is an amenable number.

666783372 is an abundant number, since it is smaller than the sum of its proper divisors (906528228).

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

666783372 is a wasteful number, since it uses less digits than its factorization.

666783372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624425 (or 624423 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 48.

The square root of 666783372 is about 25822.1488648795. The cubic root of 666783372 is about 873.6314375117.

The spelling of 666783372 in words is "six hundred sixty-six million, seven hundred eighty-three thousand, three hundred seventy-two".