1966678043 has 8 divisors (see below), whose sum is σ = 2238748416. Its totient is φ = 1710154600.

The previous prime is 1966678027. The next prime is 1966678069. The reversal of 1966678043 is 3408766691.

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

It is not a de Polignac number, because 1966678043 - 2⁴ = 1966678027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1966677982 and 1966678000.

It is not an unprimeable number, because it can be changed into a prime (1966671043) 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, 3886463 + ... + 3886968.

It is an arithmetic number, because the mean of its divisors is an integer number (279843552).

Almost surely, 2^1966678043 is an apocalyptic number.

1966678043 is a deficient number, since it is larger than the sum of its proper divisors (272070373).

1966678043 is a wasteful number, since it uses less digits than its factorization.

1966678043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773465.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 1966678043 is about 44347.2439166179. The cubic root of 1966678043 is about 1252.8846537374.

The spelling of 1966678043 in words is "one billion, nine hundred sixty-six million, six hundred seventy-eight thousand, forty-three".