61866680 has 32 divisors (see below), whose sum is σ = 142441200. Its totient is φ = 24170496.

The previous prime is 61866647. The next prime is 61866683. The reversal of 61866680 is 8666816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61866683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16265 + ... + 19704.

Almost surely, 2^61866680 is an apocalyptic number.

It is an amenable number.

61866680 is an abundant number, since it is smaller than the sum of its proper divisors (80574520).

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

61866680 is a wasteful number, since it uses less digits than its factorization.

61866680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36023 (or 36019 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 61866680 is about 7865.5374895807. The cubic root of 61866680 is about 395.5052659254.

The spelling of 61866680 in words is "sixty-one million, eight hundred sixty-six thousand, six hundred eighty".