66398299289366 has 32 divisors (see below), whose sum is σ = 108735303346560. Its totient is φ = 30157841894400.

The previous prime is 66398299289359. The next prime is 66398299289383.

It is a happy number.

66398299289366 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623223521 + ... + 623330051.

It is an arithmetic number, because the mean of its divisors is an integer number (3397978229580).

Almost surely, 2^{66398299289366} is an apocalyptic number.

66398299289366 is a deficient number, since it is larger than the sum of its proper divisors (42337004057194).

66398299289366 is a wasteful number, since it uses less digits than its factorization.

66398299289366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128060.

The product of its digits is 19591041024, while the sum is 86.

The spelling of 66398299289366 in words is "sixty-six trillion, three hundred ninety-eight billion, two hundred ninety-nine million, two hundred eighty-nine thousand, three hundred sixty-six".