61684080 has 40 divisors (see below), whose sum is σ = 191221392. Its totient is φ = 16449024.

The previous prime is 61684067. The next prime is 61684093. The reversal of 61684080 is 8048616.

It is an interprime number because it is at equal distance from previous prime (61684067) and next prime (61684093).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent 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, 128269 + ... + 128748.

Almost surely, 2^61684080 is an apocalyptic number.

61684080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61684080 is an abundant number, since it is smaller than the sum of its proper divisors (129537312).

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

61684080 is a wasteful number, since it uses less digits than its factorization.

61684080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257033 (or 257027 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 61684080 is about 7853.9213135860. The cubic root of 61684080 is about 395.1157701569.

The spelling of 61684080 in words is "sixty-one million, six hundred eighty-four thousand, eighty".