61666330 has 32 divisors (see below), whose sum is σ = 121461120. Its totient is φ = 22355520.

The previous prime is 61666307. The next prime is 61666349. The reversal of 61666330 is 3366616.

It is a junction number, because it is equal to n+sod(n) for n = 61666292 and 61666301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47652 + ... + 48928.

It is an arithmetic number, because the mean of its divisors is an integer number (3795660).

Almost surely, 2^61666330 is an apocalyptic number.

61666330 is a deficient number, since it is larger than the sum of its proper divisors (59794790).

61666330 is a wasteful number, since it uses less digits than its factorization.

61666330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 61666330 is about 7852.7912235077. The cubic root of 61666330 is about 395.0778674667.

The spelling of 61666330 in words is "sixty-one million, six hundred sixty-six thousand, three hundred thirty".