61670644 has 24 divisors (see below), whose sum is σ = 123580800. Its totient is φ = 26378976.

The previous prime is 61670633. The next prime is 61670689. The reversal of 61670644 is 44607616.

It is a happy number.

61670644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14934 + ... + 18610.

It is an arithmetic number, because the mean of its divisors is an integer number (5149200).

Almost surely, 2^61670644 is an apocalyptic number.

It is an amenable number.

61670644 is an abundant number, since it is smaller than the sum of its proper divisors (61910156).

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

61670644 is a wasteful number, since it uses less digits than its factorization.

61670644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 61670644 is about 7853.0658981063. The cubic root of 61670644 is about 395.0870800909.

The spelling of 61670644 in words is "sixty-one million, six hundred seventy thousand, six hundred forty-four".