661302449 has 8 divisors (see below), whose sum is σ = 677263680. Its totient is φ = 645526000.

The previous prime is 661302427. The next prime is 661302487. The reversal of 661302449 is 944203166.

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-661302449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661302349) 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, 38939 + ... + 53280.

It is an arithmetic number, because the mean of its divisors is an integer number (84657960).

Almost surely, 2^661302449 is an apocalyptic number.

It is an amenable number.

661302449 is a deficient number, since it is larger than the sum of its proper divisors (15961231).

661302449 is a wasteful number, since it uses less digits than its factorization.

661302449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92391.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 661302449 is about 25715.8015430202. The cubic root of 661302449 is about 871.2311143291.

The spelling of 661302449 in words is "six hundred sixty-one million, three hundred two thousand, four hundred forty-nine".