66247609794 has 16 divisors (see below), whose sum is σ = 132877054368. Its totient is φ = 22018897472.

The previous prime is 66247609793. The next prime is 66247609837. The reversal of 66247609794 is 49790674266.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66247609793) by changing a digit.

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, 15907527 + ... + 15911690.

It is an arithmetic number, because the mean of its divisors is an integer number (8304815898).

Almost surely, 2^66247609794 is an apocalyptic number.

66247609794 is an abundant number, since it is smaller than the sum of its proper divisors (66629444574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66247609794 is a wasteful number, since it uses less digits than its factorization.

66247609794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31819569.

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 66247609794 in words is "sixty-six billion, two hundred forty-seven million, six hundred nine thousand, seven hundred ninety-four".