61552666 has 32 divisors (see below), whose sum is σ = 111553920. Its totient is φ = 24952320.

The previous prime is 61552649. The next prime is 61552679. The reversal of 61552666 is 66625516.

61552666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 95706 + ... + 96346.

It is an arithmetic number, because the mean of its divisors is an integer number (3486060).

Almost surely, 2^61552666 is an apocalyptic number.

61552666 is a deficient number, since it is larger than the sum of its proper divisors (50001254).

61552666 is an equidigital number, since it uses as much as digits as its factorization.

61552666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 669 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 61552666 is about 7845.5507136211. The cubic root of 61552666 is about 394.8349810083.

The spelling of 61552666 in words is "sixty-one million, five hundred fifty-two thousand, six hundred sixty-six".