61966918 has 8 divisors (see below), whose sum is σ = 100100448. Its totient is φ = 28600104.

The previous prime is 61966909. The next prime is 61966937. The reversal of 61966918 is 81966916.

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, 1191646 + ... + 1191697.

It is an arithmetic number, because the mean of its divisors is an integer number (12512556).

Almost surely, 2^61966918 is an apocalyptic number.

61966918 is a deficient number, since it is larger than the sum of its proper divisors (38133530).

61966918 is a wasteful number, since it uses less digits than its factorization.

61966918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383358.

The product of its digits is 139968, while the sum is 46.

The square root of 61966918 is about 7871.9068846119. The cubic root of 61966918 is about 395.7187532985.

The spelling of 61966918 in words is "sixty-one million, nine hundred sixty-six thousand, nine hundred eighteen".