66201414378 has 64 divisors (see below), whose sum is σ = 145036956672. Its totient is φ = 19978206080.

The previous prime is 66201414353. The next prime is 66201414379. The reversal of 66201414378 is 87341410266.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66201414379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27320875 + ... + 27323297.

It is an arithmetic number, because the mean of its divisors is an integer number (2266202448).

Almost surely, 2^66201414378 is an apocalyptic number.

66201414378 is an abundant number, since it is smaller than the sum of its proper divisors (78835542294).

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

66201414378 is a wasteful number, since it uses less digits than its factorization.

66201414378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 66201414378 in words is "sixty-six billion, two hundred one million, four hundred fourteen thousand, three hundred seventy-eight".