66735623005 has 8 divisors (see below), whose sum is σ = 80120164824. Its totient is φ = 53363553600.

The previous prime is 66735622999. The next prime is 66735623051. The reversal of 66735623005 is 50032653766.

It can be written as a sum of positive squares in 4 ways, for example, as 33995615641 + 32740007364 = 184379^2 + 180942^2 .

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

It is not a de Polignac number, because 66735623005 - 2³ = 66735622997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106326 + ... + 3127735.

It is an arithmetic number, because the mean of its divisors is an integer number (10015020603).

Almost surely, 2^66735623005 is an apocalyptic number.

It is an amenable number.

66735623005 is a deficient number, since it is larger than the sum of its proper divisors (13384541819).

66735623005 is a wasteful number, since it uses less digits than its factorization.

66735623005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236207.

The product of its (nonzero) digits is 680400, while the sum is 43.

The spelling of 66735623005 in words is "sixty-six billion, seven hundred thirty-five million, six hundred twenty-three thousand, five".