66796506 has 96 divisors (see below), whose sum is σ = 174720000. Its totient is φ = 18416160.

The previous prime is 66796487. The next prime is 66796517. The reversal of 66796506 is 60569766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191220 + ... + 191568.

It is an arithmetic number, because the mean of its divisors is an integer number (1820000).

Almost surely, 2^66796506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66796506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87360000).

66796506 is an abundant number, since it is smaller than the sum of its proper divisors (107923494).

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

66796506 is a wasteful number, since it uses less digits than its factorization.

66796506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 66796506 is about 8172.9129445994. The cubic root of 66796506 is about 405.7431986815.

The spelling of 66796506 in words is "sixty-six million, seven hundred ninety-six thousand, five hundred six".