66738010801399 has 8 divisors (see below), whose sum is σ = 76712891029920. Its totient is φ = 56873350244256.

The previous prime is 66738010801349. The next prime is 66738010801411. The reversal of 66738010801399 is 99310801083766.

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

It is not a de Polignac number, because 66738010801399 - 2²¹ = 66738008704247 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 (66738010801349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27554916544 + ... + 27554918965.

It is an arithmetic number, because the mean of its divisors is an integer number (9589111378740).

Almost surely, 2^{66738010801399} is an apocalyptic number.

66738010801399 is a deficient number, since it is larger than the sum of its proper divisors (9974880228521).

66738010801399 is a wasteful number, since it uses less digits than its factorization.

66738010801399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55109835689.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 66738010801399 in words is "sixty-six trillion, seven hundred thirty-eight billion, ten million, eight hundred one thousand, three hundred ninety-nine".