53978066 has 8 divisors (see below), whose sum is σ = 81683964. Its totient is φ = 26750080.

The previous prime is 53978063. The next prime is 53978083. The reversal of 53978066 is 66087935.

It can be written as a sum of positive squares in 2 ways, for example, as 40132225 + 13845841 = 6335^2 + 3721^2 .

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

It is not an unprimeable number, because it can be changed into a prime (53978063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119195 + ... + 119646.

Almost surely, 2^53978066 is an apocalyptic number.

53978066 is a deficient number, since it is larger than the sum of its proper divisors (27705898).

53978066 is a wasteful number, since it uses less digits than its factorization.

53978066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238956.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 53978066 is about 7346.9766571019. The cubic root of 53978066 is about 377.9251319114.

The spelling of 53978066 in words is "fifty-three million, nine hundred seventy-eight thousand, sixty-six".