66567378 has 16 divisors (see below), whose sum is σ = 134094240. Its totient is φ = 22029216.

The previous prime is 66567377. The next prime is 66567419. The reversal of 66567378 is 87376566.

It is not an unprimeable number, because it can be changed into a prime (66567377) 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, 39075 + ... + 40742.

It is an arithmetic number, because the mean of its divisors is an integer number (8380890).

Almost surely, 2^66567378 is an apocalyptic number.

66567378 is an abundant number, since it is smaller than the sum of its proper divisors (67526862).

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

66567378 is a wasteful number, since it uses less digits than its factorization.

66567378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79961.

The product of its digits is 1270080, while the sum is 48.

The square root of 66567378 is about 8158.8833794828. The cubic root of 66567378 is about 405.2787351136.

The spelling of 66567378 in words is "sixty-six million, five hundred sixty-seven thousand, three hundred seventy-eight".