61506630 has 24 divisors (see below), whose sum is σ = 159917472. Its totient is φ = 16401744.

The previous prime is 61506619. The next prime is 61506673. The reversal of 61506630 is 3660516.

It is a junction number, because it is equal to n+sod(n) for n = 61506594 and 61506603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341614 + ... + 341793.

It is an arithmetic number, because the mean of its divisors is an integer number (6663228).

Almost surely, 2^61506630 is an apocalyptic number.

61506630 is an abundant number, since it is smaller than the sum of its proper divisors (98410842).

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

61506630 is a wasteful number, since it uses less digits than its factorization.

61506630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683420 (or 683417 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 61506630 is about 7842.6162726478. The cubic root of 61506630 is about 394.7365224699.

The spelling of 61506630 in words is "sixty-one million, five hundred six thousand, six hundred thirty".