66801374 has 8 divisors (see below), whose sum is σ = 100258320. Its totient is φ = 33381936.

The previous prime is 66801349. The next prime is 66801377. The reversal of 66801374 is 47310866.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66801377) 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 3 ways as a sum of consecutive naturals, for example, 4394 + ... + 12365.

It is an arithmetic number, because the mean of its divisors is an integer number (12532290).

Almost surely, 2^66801374 is an apocalyptic number.

66801374 is a deficient number, since it is larger than the sum of its proper divisors (33456946).

66801374 is a wasteful number, since it uses less digits than its factorization.

66801374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18754.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 66801374 is about 8173.2107522075. The cubic root of 66801374 is about 405.7530550349.

The spelling of 66801374 in words is "sixty-six million, eight hundred one thousand, three hundred seventy-four".