66690792 has 96 divisors (see below), whose sum is σ = 208428480. Its totient is φ = 18869760.

The previous prime is 66690781. The next prime is 66690859. The reversal of 66690792 is 29709666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56367 + ... + 57537.

It is an arithmetic number, because the mean of its divisors is an integer number (2171130).

Almost surely, 2^66690792 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 66690792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104214240).

66690792 is an abundant number, since it is smaller than the sum of its proper divisors (141737688).

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

66690792 is a wasteful number, since it uses less digits than its factorization.

66690792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 66690792 is about 8166.4430445574. The cubic root of 66690792 is about 405.5290388562.

The spelling of 66690792 in words is "sixty-six million, six hundred ninety thousand, seven hundred ninety-two".