661153410 has 96 divisors (see below), whose sum is σ = 1769040000. Its totient is φ = 171249408.

The previous prime is 661153403. The next prime is 661153439. The reversal of 661153410 is 14351166.

661153410 is a `hidden beast` number, since 6 + 611 + 5 + 3 + 41 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 471891 + ... + 473289.

It is an arithmetic number, because the mean of its divisors is an integer number (18427500).

Almost surely, 2^661153410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661153410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884520000).

661153410 is an abundant number, since it is smaller than the sum of its proper divisors (1107886590).

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

661153410 is a wasteful number, since it uses less digits than its factorization.

661153410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 661153410 is about 25712.9035699977. The cubic root of 661153410 is about 871.1656590698.

It can be divided in two parts, 66 and 1153410, that added together give a square (1153476 = 1074²).

The spelling of 661153410 in words is "six hundred sixty-one million, one hundred fifty-three thousand, four hundred ten".