69966390 has 128 divisors (see below), whose sum is σ = 195737472. Its totient is φ = 15851520.

The previous prime is 69966367. The next prime is 69966433. The reversal of 69966390 is 9366996.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 404344 + ... + 404516.

It is an arithmetic number, because the mean of its divisors is an integer number (1529199).

Almost surely, 2^69966390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69966390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97868736).

69966390 is an abundant number, since it is smaller than the sum of its proper divisors (125771082).

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

69966390 is a wasteful number, since it uses less digits than its factorization.

69966390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274.

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 69966390 is about 8364.5914425033. The cubic root of 69966390 is about 412.0625592313.

The spelling of 69966390 in words is "sixty-nine million, nine hundred sixty-six thousand, three hundred ninety".