61665204 has 48 divisors (see below), whose sum is σ = 147159936. Its totient is φ = 20092800.

The previous prime is 61665187. The next prime is 61665221. The reversal of 61665204 is 40256616.

It is an interprime number because it is at equal distance from previous prime (61665187) and next prime (61665221).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 133534 + ... + 133994.

It is an arithmetic number, because the mean of its divisors is an integer number (3065832).

Almost surely, 2^61665204 is an apocalyptic number.

It is an amenable number.

61665204 is an abundant number, since it is smaller than the sum of its proper divisors (85494732).

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

61665204 is a wasteful number, since it uses less digits than its factorization.

61665204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 61665204 is about 7852.7195289275. The cubic root of 61665204 is about 395.0754628028.

The spelling of 61665204 in words is "sixty-one million, six hundred sixty-five thousand, two hundred four".