66152420 has 12 divisors (see below), whose sum is σ = 138920124. Its totient is φ = 26460960.

The previous prime is 66152417. The next prime is 66152479. The reversal of 66152420 is 2425166.

It can be written as a sum of positive squares in 2 ways, for example, as 33616804 + 32535616 = 5798^2 + 5704^2 .

It is a super-2 number, since 2×66152420² = 8752285343712800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66152420.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653791 + ... + 1653830.

It is an arithmetic number, because the mean of its divisors is an integer number (11576677).

Almost surely, 2^66152420 is an apocalyptic number.

It is an amenable number.

66152420 is an abundant number, since it is smaller than the sum of its proper divisors (72767704).

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

66152420 is a wasteful number, since it uses less digits than its factorization.

66152420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307630 (or 3307628 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66152420 is about 8133.4137974162. The cubic root of 66152420 is about 404.4348567300.

Adding to 66152420 its reverse (2425166), we get a palindrome (68577586).

The spelling of 66152420 in words is "sixty-six million, one hundred fifty-two thousand, four hundred twenty".