69966078 has 64 divisors (see below), whose sum is σ = 173752320. Its totient is φ = 18289152.

The previous prime is 69966077. The next prime is 69966107. The reversal of 69966078 is 87066996.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 69966078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69966073) 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, 68838 + ... + 69846.

It is an arithmetic number, because the mean of its divisors is an integer number (2714880).

Almost surely, 2^69966078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69966078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86876160).

69966078 is an abundant number, since it is smaller than the sum of its proper divisors (103786242).

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

69966078 is a wasteful number, since it uses less digits than its factorization.

69966078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 69966078 is about 8364.5727924384. The cubic root of 69966078 is about 412.0619467291.

The spelling of 69966078 in words is "sixty-nine million, nine hundred sixty-six thousand, seventy-eight".