7725810066 has 64 divisors (see below), whose sum is σ = 16951890816. Its totient is φ = 2332915200.

The previous prime is 7725810061. The next prime is 7725810073. The reversal of 7725810066 is 6600185277.

It is not an unprimeable number, because it can be changed into a prime (7725810061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1465876 + ... + 1471136.

It is an arithmetic number, because the mean of its divisors is an integer number (264873294).

Almost surely, 2^7725810066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7725810066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8475945408).

7725810066 is an abundant number, since it is smaller than the sum of its proper divisors (9226080750).

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

7725810066 is a wasteful number, since it uses less digits than its factorization.

7725810066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5627.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 7725810066 is about 87896.5873398962. The cubic root of 7725810066 is about 1976.8847097521.

The spelling of 7725810066 in words is "seven billion, seven hundred twenty-five million, eight hundred ten thousand, sixty-six".