1966461947894 has 32 divisors (see below), whose sum is σ = 3130562463840. Its totient is φ = 924770246400.

The previous prime is 1966461947843. The next prime is 1966461947897. The reversal of 1966461947894 is 4987491646691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966461947897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946337 + ... + 2197379.

It is an arithmetic number, because the mean of its divisors is an integer number (97830076995).

Almost surely, 2^{1966461947894} is an apocalyptic number.

1966461947894 is a deficient number, since it is larger than the sum of its proper divisors (1164100515946).

1966461947894 is a wasteful number, since it uses less digits than its factorization.

1966461947894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251776.

The product of its digits is 564350976, while the sum is 74.

The spelling of 1966461947894 in words is "one trillion, nine hundred sixty-six billion, four hundred sixty-one million, nine hundred forty-seven thousand, eight hundred ninety-four".