61906680 has 224 divisors, whose sum is σ = 229005360. Its totient is φ = 14929920.

The previous prime is 61906633. The next prime is 61906697. The reversal of 61906680 is 8660916.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 320664 + ... + 320856.

Almost surely, 2^61906680 is an apocalyptic number.

61906680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61906680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114502680).

61906680 is an abundant number, since it is smaller than the sum of its proper divisors (167098680).

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

61906680 is a wasteful number, since it uses less digits than its factorization.

61906680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 61906680 is about 7868.0798165753. The cubic root of 61906680 is about 395.5904857472.

The spelling of 61906680 in words is "sixty-one million, nine hundred six thousand, six hundred eighty".