61662444 has 12 divisors (see below), whose sum is σ = 143879064. Its totient is φ = 20554144.

The previous prime is 61662431. The next prime is 61662481. The reversal of 61662444 is 44426616.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

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, 2569257 + ... + 2569280.

It is an arithmetic number, because the mean of its divisors is an integer number (11989922).

Almost surely, 2^61662444 is an apocalyptic number.

It is an amenable number.

61662444 is an abundant number, since it is smaller than the sum of its proper divisors (82216620).

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

61662444 is a wasteful number, since it uses less digits than its factorization.

61662444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138544 (or 5138542 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 61662444 is about 7852.5437916639. The cubic root of 61662444 is about 395.0695684763.

The spelling of 61662444 in words is "sixty-one million, six hundred sixty-two thousand, four hundred forty-four".