66881053 has 4 divisors (see below), whose sum is σ = 67173340. Its totient is φ = 66588768.

The previous prime is 66881051. The next prime is 66881057. The reversal of 66881053 is 35018866.

66881053 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62441604 + 4439449 = 7902^2 + 2107^2 .

It is a cyclic number.

It is not a de Polignac number, because 66881053 - 2¹ = 66881051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66881051) 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, 145800 + ... + 146257.

It is an arithmetic number, because the mean of its divisors is an integer number (16793335).

Almost surely, 2^66881053 is an apocalyptic number.

It is an amenable number.

66881053 is a deficient number, since it is larger than the sum of its proper divisors (292287).

66881053 is a wasteful number, since it uses less digits than its factorization.

66881053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292286.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 66881053 is about 8178.0836997429. The cubic root of 66881053 is about 405.9143149518.

The spelling of 66881053 in words is "sixty-six million, eight hundred eighty-one thousand, fifty-three".