516465661 has 8 divisors (see below), whose sum is σ = 548783424. Its totient is φ = 484363200.

The previous prime is 516465659. The next prime is 516465679. The reversal of 516465661 is 166564615.

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 516465661 - 2¹ = 516465659 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 (516465601) 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, 48865 + ... + 58486.

It is an arithmetic number, because the mean of its divisors is an integer number (68597928).

Almost surely, 2^516465661 is an apocalyptic number.

It is an amenable number.

516465661 is a deficient number, since it is larger than the sum of its proper divisors (32317763).

516465661 is a wasteful number, since it uses less digits than its factorization.

516465661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107651.

The product of its digits is 129600, while the sum is 40.

The square root of 516465661 is about 22725.8808630161. The cubic root of 516465661 is about 802.3191356202.

The spelling of 516465661 in words is "five hundred sixteen million, four hundred sixty-five thousand, six hundred sixty-one".