61665252 has 96 divisors (see below), whose sum is σ = 165110400. Its totient is φ = 17740800.

The previous prime is 61665221. The next prime is 61665283. The reversal of 61665252 is 25256616.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61665221) and next prime (61665283).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340602 + ... + 340782.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^61665252 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 61665252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82555200).

61665252 is an abundant number, since it is smaller than the sum of its proper divisors (103445148).

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

61665252 is a wasteful number, since it uses less digits than its factorization.

61665252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 315 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 61665252 is about 7852.7225851930. The cubic root of 61665252 is about 395.0755653113.

The spelling of 61665252 in words is "sixty-one million, six hundred sixty-five thousand, two hundred fifty-two".