66738940334 has 16 divisors (see below), whose sum is σ = 113957400960. Its totient is φ = 29016930360.

The previous prime is 66738940313. The next prime is 66738940339. The reversal of 66738940334 is 43304983766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66738940339) 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, 65947064 + ... + 65948075.

It is an arithmetic number, because the mean of its divisors is an integer number (7122337560).

Almost surely, 2^66738940334 is an apocalyptic number.

66738940334 is a deficient number, since it is larger than the sum of its proper divisors (47218460626).

66738940334 is a wasteful number, since it uses less digits than its factorization.

66738940334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131895175.

The product of its (nonzero) digits is 7838208, while the sum is 53.

The spelling of 66738940334 in words is "sixty-six billion, seven hundred thirty-eight million, nine hundred forty thousand, three hundred thirty-four".