661479463 has 2 divisors, whose sum is σ = 661479464. Its totient is φ = 661479462.

The previous prime is 661479461. The next prime is 661479487. The reversal of 661479463 is 364974166.

It is a happy number.

661479463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 661479463 - 2¹ = 661479461 is a prime.

Together with 661479461, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661479461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330739731 + 330739732.

It is an arithmetic number, because the mean of its divisors is an integer number (330739732).

Almost surely, 2^661479463 is an apocalyptic number.

661479463 is a deficient number, since it is larger than the sum of its proper divisors (1).

661479463 is an equidigital number, since it uses as much as digits as its factorization.

661479463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The square root of 661479463 is about 25719.2430487369. The cubic root of 661479463 is about 871.3088429320.

The spelling of 661479463 in words is "six hundred sixty-one million, four hundred seventy-nine thousand, four hundred sixty-three".