61660650550 has 48 divisors (see below), whose sum is σ = 119952635040. Its totient is φ = 23537226240.

The previous prime is 61660650511. The next prime is 61660650551. The reversal of 61660650550 is 5505606616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660650551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 436036 + ... + 559864.

It is an arithmetic number, because the mean of its divisors is an integer number (2499013230).

Almost surely, 2^61660650550 is an apocalyptic number.

61660650550 is a deficient number, since it is larger than the sum of its proper divisors (58291984490).

61660650550 is a wasteful number, since it uses less digits than its factorization.

61660650550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124297 (or 124292 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 61660650550 in words is "sixty-one billion, six hundred sixty million, six hundred fifty thousand, five hundred fifty".