66715292 has 48 divisors (see below), whose sum is σ = 139120128. Its totient is φ = 27397440.

The previous prime is 66715279. The next prime is 66715321. The reversal of 66715292 is 29251766.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 73103 + ... + 74009.

It is an arithmetic number, because the mean of its divisors is an integer number (2898336).

Almost surely, 2^66715292 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 66715292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69560064).

66715292 is an abundant number, since it is smaller than the sum of its proper divisors (72404836).

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

66715292 is a wasteful number, since it uses less digits than its factorization.

66715292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1024 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 66715292 is about 8167.9429478909. The cubic root of 66715292 is about 405.5786921129.

The spelling of 66715292 in words is "sixty-six million, seven hundred fifteen thousand, two hundred ninety-two".