66733930 has 16 divisors (see below), whose sum is σ = 124263720. Its totient is φ = 25772992.

The previous prime is 66733861. The next prime is 66733967. The reversal of 66733930 is 3933766.

It can be written as a sum of positive squares in 4 ways, for example, as 65885689 + 848241 = 8117^2 + 921^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66733930.

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, 114769 + ... + 115348.

Almost surely, 2^66733930 is an apocalyptic number.

66733930 is a deficient number, since it is larger than the sum of its proper divisors (57529790).

66733930 is a wasteful number, since it uses less digits than its factorization.

66733930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230153.

The product of its (nonzero) digits is 61236, while the sum is 37.

The square root of 66733930 is about 8169.0837919561. The cubic root of 66733930 is about 405.6164569272.

The spelling of 66733930 in words is "sixty-six million, seven hundred thirty-three thousand, nine hundred thirty".