66510822 has 16 divisors (see below), whose sum is σ = 152024832. Its totient is φ = 19003080.

The previous prime is 66510799. The next prime is 66510827. The reversal of 66510822 is 22801566.

It is a self number, because there is not a number n which added to its sum of digits gives 66510822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66510827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791754 + ... + 791837.

It is an arithmetic number, because the mean of its divisors is an integer number (9501552).

Almost surely, 2^66510822 is an apocalyptic number.

66510822 is an abundant number, since it is smaller than the sum of its proper divisors (85514010).

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

66510822 is a wasteful number, since it uses less digits than its factorization.

66510822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583603.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 66510822 is about 8155.4167275499. The cubic root of 66510822 is about 405.1639269340.

The spelling of 66510822 in words is "sixty-six million, five hundred ten thousand, eight hundred twenty-two".