661096049 has 8 divisors (see below), whose sum is σ = 683700480. Its totient is φ = 638571600.

The previous prime is 661095973. The next prime is 661096063. The reversal of 661096049 is 940690166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661096049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 661095997 and 661096015.

It is not an unprimeable number, because it can be changed into a prime (661096069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2939 + ... + 36480.

It is an arithmetic number, because the mean of its divisors is an integer number (85462560).

Almost surely, 2^661096049 is an apocalyptic number.

It is an amenable number.

661096049 is a deficient number, since it is larger than the sum of its proper divisors (22604431).

661096049 is a wasteful number, since it uses less digits than its factorization.

661096049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39991.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 661096049 is about 25711.7881330723. The cubic root of 661096049 is about 871.1404645245.

The spelling of 661096049 in words is "six hundred sixty-one million, ninety-six thousand, forty-nine".