55742666 has 8 divisors (see below), whose sum is σ = 95558880. Its totient is φ = 23889708.

The previous prime is 55742653. The next prime is 55742671. The reversal of 55742666 is 66624755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990796 + ... + 1990823.

It is an arithmetic number, because the mean of its divisors is an integer number (11944860).

Almost surely, 2^55742666 is an apocalyptic number.

55742666 is a deficient number, since it is larger than the sum of its proper divisors (39816214).

55742666 is a wasteful number, since it uses less digits than its factorization.

55742666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981628.

The product of its digits is 302400, while the sum is 41.

The square root of 55742666 is about 7466.1011244156. The cubic root of 55742666 is about 381.9993101419. Note that the first 3 decimals are identical.

The spelling of 55742666 in words is "fifty-five million, seven hundred forty-two thousand, six hundred sixty-six".