661929119 has 8 divisors (see below), whose sum is σ = 701437968. Its totient is φ = 622483840.

The previous prime is 661929109. The next prime is 661929131. The reversal of 661929119 is 911929166.

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 661929119 - 2⁸ = 661928863 is a prime.

It is a super-2 number, since 2×661929119² = 876300317160232322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 661929119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661929109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6464 + ... + 36954.

It is an arithmetic number, because the mean of its divisors is an integer number (87679746).

Almost surely, 2^661929119 is an apocalyptic number.

661929119 is a deficient number, since it is larger than the sum of its proper divisors (39508849).

661929119 is a wasteful number, since it uses less digits than its factorization.

661929119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31785.

The product of its digits is 52488, while the sum is 44.

The square root of 661929119 is about 25727.9831895157. The cubic root of 661929119 is about 871.5062290080.

The spelling of 661929119 in words is "six hundred sixty-one million, nine hundred twenty-nine thousand, one hundred nineteen".