66899053 has 8 divisors (see below), whose sum is σ = 72235800. Its totient is φ = 61589568.

The previous prime is 66899039. The next prime is 66899059. The reversal of 66899053 is 35099866.

It can be written as a sum of positive squares in 4 ways, for example, as 11812969 + 55086084 = 3437^2 + 7422^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66899053 - 2¹³ = 66890861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66898994 and 66899012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66899059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1558 + ... + 11671.

It is an arithmetic number, because the mean of its divisors is an integer number (9029475).

Almost surely, 2^66899053 is an apocalyptic number.

It is an amenable number.

66899053 is a deficient number, since it is larger than the sum of its proper divisors (5336747).

66899053 is a wasteful number, since it uses less digits than its factorization.

66899053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13631.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 66899053 is about 8179.1841280167. The cubic root of 66899053 is about 405.9507268700.

The spelling of 66899053 in words is "sixty-six million, eight hundred ninety-nine thousand, fifty-three".