66551674 has 16 divisors (see below), whose sum is σ = 114605568. Its totient is φ = 28392912.

The previous prime is 66551669. The next prime is 66551713. The reversal of 66551674 is 47615566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7537 + ... + 13780.

It is an arithmetic number, because the mean of its divisors is an integer number (7162848).

Almost surely, 2^66551674 is an apocalyptic number.

66551674 is a deficient number, since it is larger than the sum of its proper divisors (48053894).

66551674 is a wasteful number, since it uses less digits than its factorization.

66551674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21549.

The product of its digits is 151200, while the sum is 40.

The square root of 66551674 is about 8157.9209361209. The cubic root of 66551674 is about 405.2468626560.

The spelling of 66551674 in words is "sixty-six million, five hundred fifty-one thousand, six hundred seventy-four".