66308490849 has 16 divisors (see below), whose sum is σ = 97110835200. Its totient is φ = 40058217936.

The previous prime is 66308490841. The next prime is 66308490863. The reversal of 66308490849 is 94809480366.

It is not a de Polignac number, because 66308490849 - 2³ = 66308490841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (66308490841) 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 15 ways as a sum of consecutive naturals, for example, 25287969 + ... + 25290590.

It is an arithmetic number, because the mean of its divisors is an integer number (6069427200).

Almost surely, 2^66308490849 is an apocalyptic number.

66308490849 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

66308490849 is a deficient number, since it is larger than the sum of its proper divisors (30802344351).

66308490849 is a wasteful number, since it uses less digits than its factorization.

66308490849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50578604.

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 66308490849 in words is "sixty-six billion, three hundred eight million, four hundred ninety thousand, eight hundred forty-nine".