61664252 has 12 divisors (see below), whose sum is σ = 116213496. Its totient is φ = 28460400.

The previous prime is 61664231. The next prime is 61664257. The reversal of 61664252 is 25246616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61664257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592874 + ... + 592977.

It is an arithmetic number, because the mean of its divisors is an integer number (9684458).

Almost surely, 2^61664252 is an apocalyptic number.

It is an amenable number.

61664252 is a deficient number, since it is larger than the sum of its proper divisors (54549244).

61664252 is a wasteful number, since it uses less digits than its factorization.

61664252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185868 (or 1185866 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 61664252 is about 7852.6589127505. The cubic root of 61664252 is about 395.0734297072.

It can be divided in two parts, 61664 and 252, that added together give a palindrome (61916).

The spelling of 61664252 in words is "sixty-one million, six hundred sixty-four thousand, two hundred fifty-two".