653266764 has 72 divisors (see below), whose sum is σ = 1701816480. Its totient is φ = 211191552.

The previous prime is 653266763. The next prime is 653266777. The reversal of 653266764 is 467662356.

It is not an unprimeable number, because it can be changed into a prime (653266763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167889 + ... + 171735.

It is an arithmetic number, because the mean of its divisors is an integer number (23636340).

Almost surely, 2^653266764 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 653266764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850908240).

653266764 is an abundant number, since it is smaller than the sum of its proper divisors (1048549716).

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

653266764 is a wasteful number, since it uses less digits than its factorization.

653266764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999 (or 3994 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 653266764 is about 25559.0837863958. The cubic root of 653266764 is about 867.6878598323.

The spelling of 653266764 in words is "six hundred fifty-three million, two hundred sixty-six thousand, seven hundred sixty-four".