61665016 has 32 divisors (see below), whose sum is σ = 133741440. Its totient is φ = 26107488.

The previous prime is 61665011. The next prime is 61665017. The reversal of 61665016 is 61056616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61665011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986 + ... + 11281.

It is an arithmetic number, because the mean of its divisors is an integer number (4179420).

Almost surely, 2^61665016 is an apocalyptic number.

It is an amenable number.

61665016 is an abundant number, since it is smaller than the sum of its proper divisors (72076424).

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

61665016 is a wasteful number, since it uses less digits than its factorization.

61665016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13363 (or 13359 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 61665016 is about 7852.7075585431. The cubic root of 61665016 is about 395.0750613108.

Subtracting from 61665016 its reverse (61056616), we obtain a square (608400 = 780²).

The spelling of 61665016 in words is "sixty-one million, six hundred sixty-five thousand, sixteen".