66806715374 has 36 divisors (see below), whose sum is σ = 117767824776. Its totient is φ = 27842705424.

The previous prime is 66806715343. The next prime is 66806715401. The reversal of 66806715374 is 47351760866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35781989 + ... + 35783855.

It is an arithmetic number, because the mean of its divisors is an integer number (3271328466).

Almost surely, 2^66806715374 is an apocalyptic number.

66806715374 is a deficient number, since it is larger than the sum of its proper divisors (50961109402).

66806715374 is an frugal number, since it uses more digits than its factorization.

66806715374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 66806715374 in words is "sixty-six billion, eight hundred six million, seven hundred fifteen thousand, three hundred seventy-four".