661096051 has 48 divisors (see below), whose sum is σ = 921715200. Its totient is φ = 458991360.

The previous prime is 661095973. The next prime is 661096063. The reversal of 661096051 is 150690166.

It is not a de Polignac number, because 661096051 - 2¹³ = 661087859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661095998 and 661096016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661096091) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 471850 + ... + 473248.

It is an arithmetic number, because the mean of its divisors is an integer number (19202400).

Almost surely, 2^661096051 is an apocalyptic number.

661096051 is a deficient number, since it is larger than the sum of its proper divisors (260619149).

661096051 is a wasteful number, since it uses less digits than its factorization.

661096051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 661096051 is about 25711.7881719650. The cubic root of 661096051 is about 871.1404654030.

The spelling of 661096051 in words is "six hundred sixty-one million, ninety-six thousand, fifty-one".