661470323 has 8 divisors (see below), whose sum is σ = 701969328. Its totient is φ = 621147904.

The previous prime is 661470287. The next prime is 661470353. The reversal of 661470323 is 323074166.

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

It is not a de Polignac number, because 661470323 - 2¹² = 661466227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 661470323.

It is not an unprimeable number, because it can be changed into a prime (661470353) 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, 36386 + ... + 51447.

It is an arithmetic number, because the mean of its divisors is an integer number (87746166).

Almost surely, 2^661470323 is an apocalyptic number.

661470323 is a deficient number, since it is larger than the sum of its proper divisors (40499005).

661470323 is a wasteful number, since it uses less digits than its factorization.

661470323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88293.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 661470323 is about 25719.0653601565. The cubic root of 661470323 is about 871.3048298069.

The spelling of 661470323 in words is "six hundred sixty-one million, four hundred seventy thousand, three hundred twenty-three".