66796164 has 60 divisors (see below), whose sum is σ = 180665100. Its totient is φ = 21494592.

The previous prime is 66796127. The next prime is 66796183. The reversal of 66796164 is 46169766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21233664 + 45562500 = 4608^2 + 6750^2 .

It is a super-2 number, since 2×66796164² = 8923455050229792, which contains 22 as substring.

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, 5842 + ... + 12950.

It is an arithmetic number, because the mean of its divisors is an integer number (3011085).

Almost surely, 2^66796164 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 66796164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90332550).

66796164 is an abundant number, since it is smaller than the sum of its proper divisors (113868936).

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

66796164 is a wasteful number, since it uses less digits than its factorization.

66796164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154 (or 7143 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 66796164 is about 8172.8920217999. The cubic root of 66796164 is about 405.7425062081.

The spelling of 66796164 in words is "sixty-six million, seven hundred ninety-six thousand, one hundred sixty-four".