661568483 has 4 divisors (see below), whose sum is σ = 668118768. Its totient is φ = 655018200.

The previous prime is 661568461. The next prime is 661568507. The reversal of 661568483 is 384865166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 661568483 - 2¹⁸ = 661306339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661568443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3274991 + ... + 3275192.

It is an arithmetic number, because the mean of its divisors is an integer number (167029692).

Almost surely, 2^661568483 is an apocalyptic number.

661568483 is a deficient number, since it is larger than the sum of its proper divisors (6550285).

661568483 is a wasteful number, since it uses less digits than its factorization.

661568483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6550284.

The product of its digits is 829440, while the sum is 47.

The square root of 661568483 is about 25720.9736013239. The cubic root of 661568483 is about 871.3479272565.

The spelling of 661568483 in words is "six hundred sixty-one million, five hundred sixty-eight thousand, four hundred eighty-three".