511497666 has 80 divisors (see below), whose sum is σ = 1229437440. Its totient is φ = 158371200.

The previous prime is 511497659. The next prime is 511497719. The reversal of 511497666 is 666794115.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 216391 + ... + 218741.

It is an arithmetic number, because the mean of its divisors is an integer number (15367968).

Almost surely, 2^511497666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 511497666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614718720).

511497666 is an abundant number, since it is smaller than the sum of its proper divisors (717939774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511497666 is a wasteful number, since it uses less digits than its factorization.

511497666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461 (or 2452 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 511497666 is about 22616.3141559362. The cubic root of 511497666 is about 799.7382820973.

The spelling of 511497666 in words is "five hundred eleven million, four hundred ninety-seven thousand, six hundred sixty-six".