66554930 has 16 divisors (see below), whose sum is σ = 129014424. Its totient is φ = 24574080.

The previous prime is 66554921. The next prime is 66554941. The reversal of 66554930 is 3945566.

It can be written as a sum of positive squares in 4 ways, for example, as 26245129 + 40309801 = 5123^2 + 6349^2 .

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, 255851 + ... + 256110.

Almost surely, 2^66554930 is an apocalyptic number.

66554930 is a deficient number, since it is larger than the sum of its proper divisors (62459494).

66554930 is a wasteful number, since it uses less digits than its factorization.

66554930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511981.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 66554930 is about 8158.1204943296. The cubic root of 66554930 is about 405.2534713666.

The spelling of 66554930 in words is "sixty-six million, five hundred fifty-four thousand, nine hundred thirty".