1966953678 has 8 divisors (see below), whose sum is σ = 3933907368. Its totient is φ = 655651224.

The previous prime is 1966953631. The next prime is 1966953691. The reversal of 1966953678 is 8763596691.

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

1966953678 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163912801 + ... + 163912812.

It is an arithmetic number, because the mean of its divisors is an integer number (491738421).

Almost surely, 2^1966953678 is an apocalyptic number.

1966953678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1966953678 is a wasteful number, since it uses less digits than its factorization.

1966953678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327825618.

The product of its digits is 14696640, while the sum is 60.

The square root of 1966953678 is about 44350.3514980434. The cubic root of 1966953678 is about 1252.9431826750.

The spelling of 1966953678 in words is "one billion, nine hundred sixty-six million, nine hundred fifty-three thousand, six hundred seventy-eight".