61075665 has 24 divisors (see below), whose sum is σ = 120988608. Its totient is φ = 27920160.

The previous prime is 61075657. The next prime is 61075667. The reversal of 61075665 is 56657016.

It is a happy number.

It is not a de Polignac number, because 61075665 - 2³ = 61075657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61075667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96631 + ... + 97260.

It is an arithmetic number, because the mean of its divisors is an integer number (5041192).

Almost surely, 2^61075665 is an apocalyptic number.

It is an amenable number.

61075665 is a deficient number, since it is larger than the sum of its proper divisors (59912943).

61075665 is a wasteful number, since it uses less digits than its factorization.

61075665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193909 (or 193906 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 61075665 is about 7815.0921299752. The cubic root of 61075665 is about 393.8124133867.

The spelling of 61075665 in words is "sixty-one million, seventy-five thousand, six hundred sixty-five".