61357666608 has 360 divisors, whose sum is σ = 205186179744. Its totient is φ = 16764641280.

The previous prime is 61357666583. The next prime is 61357666621. The reversal of 61357666608 is 80666675316.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 93962410 + ... + 93963062.

Almost surely, 2^61357666608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61357666608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102593089872).

61357666608 is an abundant number, since it is smaller than the sum of its proper divisors (143828513136).

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

61357666608 is a wasteful number, since it uses less digits than its factorization.

61357666608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 61357666608 in words is "sixty-one billion, three hundred fifty-seven million, six hundred sixty-six thousand, six hundred eight".