661024705 has 8 divisors (see below), whose sum is σ = 865341504. Its totient is φ = 480745200.

The previous prime is 661024703. The next prime is 661024711. The reversal of 661024705 is 507420166.

It is a happy number.

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

It is not a de Polignac number, because 661024705 - 2¹ = 661024703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661024703) 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 7 ways as a sum of consecutive naturals, for example, 6009261 + ... + 6009370.

It is an arithmetic number, because the mean of its divisors is an integer number (108167688).

Almost surely, 2^661024705 is an apocalyptic number.

It is an amenable number.

661024705 is a deficient number, since it is larger than the sum of its proper divisors (204316799).

661024705 is a wasteful number, since it uses less digits than its factorization.

661024705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12018647.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 661024705 is about 25710.4007164416. The cubic root of 661024705 is about 871.1091262234.

It can be divided in two parts, 66102 and 4705, that added together give a palindrome (70807).

The spelling of 661024705 in words is "six hundred sixty-one million, twenty-four thousand, seven hundred five".