61065920 has 56 divisors (see below), whose sum is σ = 151753824. Its totient is φ = 23361536.

The previous prime is 61065883. The next prime is 61065923. The reversal of 61065920 is 2956016.

It is not an unprimeable number, because it can be changed into a prime (61065923) 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, 3212 + ... + 11508.

Almost surely, 2^61065920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61065920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75876912).

61065920 is an abundant number, since it is smaller than the sum of its proper divisors (90687904).

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

61065920 is a wasteful number, since it uses less digits than its factorization.

61065920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337 (or 8327 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 61065920 is about 7814.4686319672. The cubic root of 61065920 is about 393.7914672041.

The spelling of 61065920 in words is "sixty-one million, sixty-five thousand, nine hundred twenty".