661314455 has 8 divisors (see below), whose sum is σ = 805422192. Its totient is φ = 521155008.

The previous prime is 661314427. The next prime is 661314457. The reversal of 661314455 is 554413166.

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

It is a cyclic number.

It is not a de Polignac number, because 661314455 - 2⁶ = 661314391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661314457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986702 + ... + 987371.

It is an arithmetic number, because the mean of its divisors is an integer number (100677774).

Almost surely, 2^661314455 is an apocalyptic number.

661314455 is a deficient number, since it is larger than the sum of its proper divisors (144107737).

661314455 is a wasteful number, since it uses less digits than its factorization.

661314455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974145.

The product of its digits is 43200, while the sum is 35.

The square root of 661314455 is about 25716.0349781999. The cubic root of 661314455 is about 871.2363867213.

The spelling of 661314455 in words is "six hundred sixty-one million, three hundred fourteen thousand, four hundred fifty-five".