661135702 has 8 divisors (see below), whose sum is σ = 991938312. Its totient is φ = 330489600.

The previous prime is 661135697. The next prime is 661135771. The reversal of 661135702 is 207531166.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27924 + ... + 45847.

It is an arithmetic number, because the mean of its divisors is an integer number (123992289).

Almost surely, 2^661135702 is an apocalyptic number.

661135702 is a deficient number, since it is larger than the sum of its proper divisors (330802610).

661135702 is a wasteful number, since it uses less digits than its factorization.

661135702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78254.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 661135702 is about 25712.5592269614. The cubic root of 661135702 is about 871.1578813796.

Adding to 661135702 its reverse (207531166), we get a palindrome (868666868).

The spelling of 661135702 in words is "six hundred sixty-one million, one hundred thirty-five thousand, seven hundred two".