66696192 has 66 divisors (see below), whose sum is σ = 192610418. Its totient is φ = 22228992.

The previous prime is 66696187. The next prime is 66696197. The reversal of 66696192 is 29169666.

It is an interprime number because it is at equal distance from previous prime (66696187) and next prime (66696197).

It can be written as a sum of positive squares in only one way, i.e., 60466176 + 6230016 = 7776^2 + 2496^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66696197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5598 + ... + 12834.

Almost surely, 2^66696192 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 66696192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96305209).

66696192 is an abundant number, since it is smaller than the sum of its proper divisors (125914226).

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

66696192 is a wasteful number, since it uses less digits than its factorization.

66696192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7263 (or 7242 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 66696192 is about 8166.7736591631. The cubic root of 66696192 is about 405.5399838840.

The spelling of 66696192 in words is "sixty-six million, six hundred ninety-six thousand, one hundred ninety-two".