66730392 has 160 divisors (see below), whose sum is σ = 199940400. Its totient is φ = 20756736.

The previous prime is 66730387. The next prime is 66730399. The reversal of 66730392 is 29303766.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66730399) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 995943 + ... + 996009.

Almost surely, 2^66730392 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 66730392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99970200).

66730392 is an abundant number, since it is smaller than the sum of its proper divisors (133210008).

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

66730392 is a wasteful number, since it uses less digits than its factorization.

66730392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 66730392 is about 8168.8672409337. The cubic root of 66730392 is about 405.6092886777.

The spelling of 66730392 in words is "sixty-six million, seven hundred thirty thousand, three hundred ninety-two".