66837378 has 8 divisors (see below), whose sum is σ = 133674768. Its totient is φ = 22279124.

The previous prime is 66837371. The next prime is 66837403. The reversal of 66837378 is 87373866.

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

66837378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66837371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5569776 + ... + 5569787.

It is an arithmetic number, because the mean of its divisors is an integer number (16709346).

Almost surely, 2^66837378 is an apocalyptic number.

66837378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66837378 is a wasteful number, since it uses less digits than its factorization.

66837378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139568.

The product of its digits is 1016064, while the sum is 48.

The square root of 66837378 is about 8175.4130170897. The cubic root of 66837378 is about 405.8259383123.

The spelling of 66837378 in words is "sixty-six million, eight hundred thirty-seven thousand, three hundred seventy-eight".