661048683 has 4 divisors (see below), whose sum is σ = 881398248. Its totient is φ = 440699120.

The previous prime is 661048673. The next prime is 661048691. The reversal of 661048683 is 386840166.

It is a happy number.

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 661048683 - 2²⁸ = 392613227 is a prime.

It is a super-2 number, since 2×661048683² = 873970722592068978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661048673) 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, 110174778 + ... + 110174783.

It is an arithmetic number, because the mean of its divisors is an integer number (220349562).

Almost surely, 2^661048683 is an apocalyptic number.

661048683 is a deficient number, since it is larger than the sum of its proper divisors (220349565).

661048683 is a wasteful number, since it uses less digits than its factorization.

661048683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220349564.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 661048683 is about 25710.8670215534. The cubic root of 661048683 is about 871.1196589624.

The spelling of 661048683 in words is "six hundred sixty-one million, forty-eight thousand, six hundred eighty-three".