1966111705 has 8 divisors (see below), whose sum is σ = 2373809472. Its totient is φ = 1563239088.

The previous prime is 1966111703. The next prime is 1966111709. The reversal of 1966111705 is 5071116691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1966111705 - 2¹ = 1966111703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1966111703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205389 + ... + 1207018.

It is an arithmetic number, because the mean of its divisors is an integer number (296726184).

Almost surely, 2^1966111705 is an apocalyptic number.

It is an amenable number.

1966111705 is a deficient number, since it is larger than the sum of its proper divisors (407697767).

1966111705 is a wasteful number, since it uses less digits than its factorization.

1966111705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412575.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 1966111705 is about 44340.8581897103. The cubic root of 1966111705 is about 1252.7643791265.

The spelling of 1966111705 in words is "one billion, nine hundred sixty-six million, one hundred eleven thousand, seven hundred five".