61587668 has 12 divisors (see below), whose sum is σ = 114118452. Its totient is φ = 28982400.

The previous prime is 61587667. The next prime is 61587709. The reversal of 61587668 is 86678516.

61587668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35188624 + 26399044 = 5932^2 + 5138^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61587661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 452783 + ... + 452918.

It is an arithmetic number, because the mean of its divisors is an integer number (9509871).

Almost surely, 2^61587668 is an apocalyptic number.

61587668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61587668 is a deficient number, since it is larger than the sum of its proper divisors (52530784).

61587668 is a wasteful number, since it uses less digits than its factorization.

61587668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905722 (or 905720 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 61587668 is about 7847.7810876706. The cubic root of 61587668 is about 394.9098079607.

The spelling of 61587668 in words is "sixty-one million, five hundred eighty-seven thousand, six hundred sixty-eight".