66100078 has 8 divisors (see below), whose sum is σ = 108163800. Its totient is φ = 30045480.

The previous prime is 66100051. The next prime is 66100079. The reversal of 66100078 is 87000166.

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 (66100079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502253 + ... + 1502296.

It is an arithmetic number, because the mean of its divisors is an integer number (13520475).

Almost surely, 2^66100078 is an apocalyptic number.

66100078 is a deficient number, since it is larger than the sum of its proper divisors (42063722).

66100078 is a wasteful number, since it uses less digits than its factorization.

66100078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004562.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 66100078 is about 8130.1954466052. The cubic root of 66100078 is about 404.3281611376.

The spelling of 66100078 in words is "sixty-six million, one hundred thousand, seventy-eight".