666603772 has 12 divisors (see below), whose sum is σ = 1167470640. Its totient is φ = 333040736.

The previous prime is 666603727. The next prime is 666603797. The reversal of 666603772 is 277306666.

It is a super-3 number, since 3×666603772³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59488 + ... + 69799.

It is an arithmetic number, because the mean of its divisors is an integer number (97289220).

Almost surely, 2^666603772 is an apocalyptic number.

It is an amenable number.

666603772 is a deficient number, since it is larger than the sum of its proper divisors (500866868).

666603772 is a wasteful number, since it uses less digits than its factorization.

666603772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130580 (or 130578 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 43.

The square root of 666603772 is about 25818.6709960060. The cubic root of 666603772 is about 873.5529920963.

The spelling of 666603772 in words is "six hundred sixty-six million, six hundred three thousand, seven hundred seventy-two".