1994712566 has 64 divisors (see below), whose sum is σ = 3884751360. Its totient is φ = 745632000.

The previous prime is 1994712563. The next prime is 1994712593. The reversal of 1994712566 is 6652174991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994712563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382565 + ... + 387743.

It is an arithmetic number, because the mean of its divisors is an integer number (60699240).

Almost surely, 2^1994712566 is an apocalyptic number.

1994712566 is a deficient number, since it is larger than the sum of its proper divisors (1890038794).

1994712566 is a wasteful number, since it uses less digits than its factorization.

1994712566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5301.

The product of its digits is 816480, while the sum is 50.

The square root of 1994712566 is about 44662.2051179742. The cubic root of 1994712566 is about 1258.8097784570.

The spelling of 1994712566 in words is "one billion, nine hundred ninety-four million, seven hundred twelve thousand, five hundred sixty-six".