661114453550 has 48 divisors (see below), whose sum is σ = 1232633106432. Its totient is φ = 263809634400.

The previous prime is 661114453541. The next prime is 661114453553. The reversal of 661114453550 is 55354411166.

It is a junction number, because it is equal to n+sod(n) for n = 661114453498 and 661114453507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661114453553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88297907 + ... + 88305393.

It is an arithmetic number, because the mean of its divisors is an integer number (25679856384).

Almost surely, 2^661114453550 is an apocalyptic number.

661114453550 is a deficient number, since it is larger than the sum of its proper divisors (571518652882).

661114453550 is a wasteful number, since it uses less digits than its factorization.

661114453550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11513 (or 11508 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 661114453550 in words is "six hundred sixty-one billion, one hundred fourteen million, four hundred fifty-three thousand, five hundred fifty".