61966668 has 24 divisors (see below), whose sum is σ = 145696320. Its totient is φ = 20497360.

The previous prime is 61966651. The next prime is 61966673. The reversal of 61966668 is 86666916.

It is a happy number.

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, 18138 + ... + 21281.

It is an arithmetic number, because the mean of its divisors is an integer number (6070680).

Almost surely, 2^61966668 is an apocalyptic number.

It is an amenable number.

61966668 is an abundant number, since it is smaller than the sum of its proper divisors (83729652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61966668 is a wasteful number, since it uses less digits than its factorization.

61966668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39557 (or 39555 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 61966668 is about 7871.8910053430. The cubic root of 61966668 is about 395.7182211338.

The spelling of 61966668 in words is "sixty-one million, nine hundred sixty-six thousand, six hundred sixty-eight".