61980166 has 8 divisors (see below), whose sum is σ = 97863480. Its totient is φ = 29359008.

The previous prime is 61980133. The next prime is 61980173. The reversal of 61980166 is 66108916.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815491 + ... + 815566.

It is an arithmetic number, because the mean of its divisors is an integer number (12232935).

Almost surely, 2^61980166 is an apocalyptic number.

61980166 is a deficient number, since it is larger than the sum of its proper divisors (35883314).

61980166 is a wasteful number, since it uses less digits than its factorization.

61980166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631078.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 61980166 is about 7872.7483130099. The cubic root of 61980166 is about 395.7469517237.

The spelling of 61980166 in words is "sixty-one million, nine hundred eighty thousand, one hundred sixty-six".