66075078 has 16 divisors (see below), whose sum is σ = 134317296. Its totient is φ = 21663840.

The previous prime is 66075077. The next prime is 66075083. The reversal of 66075078 is 87057066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66075071) 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, 89901 + ... + 90632.

It is an arithmetic number, because the mean of its divisors is an integer number (8394831).

Almost surely, 2^66075078 is an apocalyptic number.

66075078 is an abundant number, since it is smaller than the sum of its proper divisors (68242218).

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

66075078 is a wasteful number, since it uses less digits than its factorization.

66075078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180599.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 66075078 is about 8128.6578227897. The cubic root of 66075078 is about 404.2771804683.

The spelling of 66075078 in words is "sixty-six million, seventy-five thousand, seventy-eight".