66769344 has 84 divisors (see below), whose sum is σ = 201488040. Its totient is φ = 21081600.

The previous prime is 66769343. The next prime is 66769369. The reversal of 66769344 is 44396766.

It is a self number, because there is not a number n which added to its sum of digits gives 66769344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66769343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7894 + ... + 13994.

Almost surely, 2^66769344 is an apocalyptic number.

66769344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66769344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100744020).

66769344 is an abundant number, since it is smaller than the sum of its proper divisors (134718696).

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

66769344 is a wasteful number, since it uses less digits than its factorization.

66769344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6138 (or 6125 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 66769344 is about 8171.2510670031. The cubic root of 66769344 is about 405.6881943528.

The spelling of 66769344 in words is "sixty-six million, seven hundred sixty-nine thousand, three hundred forty-four".