666112747 has 4 divisors (see below), whose sum is σ = 666305136. Its totient is φ = 665920360.

The previous prime is 666112723. The next prime is 666112763. The reversal of 666112747 is 747211666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747211666 = 2 ⋅373605833.

It is a cyclic number.

It is not a de Polignac number, because 666112747 - 2¹⁹ = 665588459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666112847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90904 + ... + 97957.

It is an arithmetic number, because the mean of its divisors is an integer number (166576284).

Almost surely, 2^666112747 is an apocalyptic number.

666112747 is a deficient number, since it is larger than the sum of its proper divisors (192389).

666112747 is a wasteful number, since it uses less digits than its factorization.

666112747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192388.

The product of its digits is 84672, while the sum is 40.

The square root of 666112747 is about 25809.1601374396. The cubic root of 666112747 is about 873.3384509959.

The spelling of 666112747 in words is "six hundred sixty-six million, one hundred twelve thousand, seven hundred forty-seven".