66254020 has 48 divisors (see below), whose sum is σ = 162408960. Its totient is φ = 22230144.

The previous prime is 66253963. The next prime is 66254057. The reversal of 66254020 is 2045266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1546 + ... + 11614.

It is an arithmetic number, because the mean of its divisors is an integer number (3383520).

Almost surely, 2^66254020 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 66254020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81204480).

66254020 is an abundant number, since it is smaller than the sum of its proper divisors (96154940).

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

66254020 is a wasteful number, since it uses less digits than its factorization.

66254020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10132 (or 10130 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 66254020 is about 8139.6572409408. The cubic root of 66254020 is about 404.6418008503.

Adding to 66254020 its reverse (2045266), we get a palindrome (68299286).

The spelling of 66254020 in words is "sixty-six million, two hundred fifty-four thousand, twenty".