661364311 has 8 divisors (see below), whose sum is σ = 705784320. Its totient is φ = 617557248.

The previous prime is 661364281. The next prime is 661364329. The reversal of 661364311 is 113463166.

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

It is a cyclic number.

It is not a de Polignac number, because 661364311 - 2⁵ = 661364279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661364371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151006 + ... + 155323.

It is an arithmetic number, because the mean of its divisors is an integer number (88223040).

Almost surely, 2^661364311 is an apocalyptic number.

661364311 is a deficient number, since it is larger than the sum of its proper divisors (44420009).

661364311 is a wasteful number, since it uses less digits than its factorization.

661364311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306473.

The product of its digits is 7776, while the sum is 31.

The square root of 661364311 is about 25717.0043162107. The cubic root of 661364311 is about 871.2582801233.

The spelling of 661364311 in words is "six hundred sixty-one million, three hundred sixty-four thousand, three hundred eleven".