53778966 has 8 divisors (see below), whose sum is σ = 107557944. Its totient is φ = 17926320.

The previous prime is 53778943. The next prime is 53778997. The reversal of 53778966 is 66987735.

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

53778966 is an admirable 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, 4481575 + ... + 4481586.

It is an arithmetic number, because the mean of its divisors is an integer number (13444743).

Almost surely, 2^53778966 is an apocalyptic number.

53778966 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.

53778966 is a wasteful number, since it uses less digits than its factorization.

53778966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963166.

The product of its digits is 1905120, while the sum is 51.

The square root of 53778966 is about 7333.4143480373. The cubic root of 53778966 is about 377.4598960365.

The spelling of 53778966 in words is "fifty-three million, seven hundred seventy-eight thousand, nine hundred sixty-six".