61663089 has 4 divisors (see below), whose sum is σ = 82217456. Its totient is φ = 41108724.

The previous prime is 61663087. The next prime is 61663103. The reversal of 61663089 is 98036616.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61663089 - 2¹ = 61663087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61663081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10277179 + ... + 10277184.

It is an arithmetic number, because the mean of its divisors is an integer number (20554364).

Almost surely, 2^61663089 is an apocalyptic number.

It is an amenable number.

61663089 is a deficient number, since it is larger than the sum of its proper divisors (20554367).

61663089 is a wasteful number, since it uses less digits than its factorization.

61663089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20554366.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 61663089 is about 7852.5848610505. The cubic root of 61663089 is about 395.0709459705.

The spelling of 61663089 in words is "sixty-one million, six hundred sixty-three thousand, eighty-nine".