661007733 has 4 divisors (see below), whose sum is σ = 881343648. Its totient is φ = 440671820.

The previous prime is 661007713. The next prime is 661007749. The reversal of 661007733 is 337700166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 661007733 - 2¹⁷ = 660876661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661007694 and 661007703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661007713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110167953 + ... + 110167958.

It is an arithmetic number, because the mean of its divisors is an integer number (220335912).

Almost surely, 2^661007733 is an apocalyptic number.

It is an amenable number.

661007733 is a deficient number, since it is larger than the sum of its proper divisors (220335915).

661007733 is a wasteful number, since it uses less digits than its factorization.

661007733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220335914.

The product of its (nonzero) digits is 15876, while the sum is 33.

The square root of 661007733 is about 25710.0706533452. The cubic root of 661007733 is about 871.1016708335.

Adding to 661007733 its reverse (337700166), we get a palindrome (998707899).

The spelling of 661007733 in words is "six hundred sixty-one million, seven thousand, seven hundred thirty-three".