66269664 has 120 divisors (see below), whose sum is σ = 200454408. Its totient is φ = 21461760.

The previous prime is 66269659. The next prime is 66269677. The reversal of 66269664 is 46696266.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 95559 + ... + 96249.

Almost surely, 2^66269664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66269664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100227204).

66269664 is an abundant number, since it is smaller than the sum of its proper divisors (134184744).

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

66269664 is a wasteful number, since it uses less digits than its factorization.

66269664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 733 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 66269664 is about 8140.6181583465. The cubic root of 66269664 is about 404.6736465565.

It can be divided in two parts, 6626 and 9664, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 66269664 in words is "sixty-six million, two hundred sixty-nine thousand, six hundred sixty-four".