666613476 has 60 divisors (see below), whose sum is σ = 1749508992. Its totient is φ = 221331312.

The previous prime is 666613463. The next prime is 666613481. The reversal of 666613476 is 674316666.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 81301 + ... + 89123.

Almost surely, 2^666613476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666613476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874754496).

666613476 is an abundant number, since it is smaller than the sum of its proper divisors (1082895516).

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

666613476 is a wasteful number, since it uses less digits than its factorization.

666613476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102 (or 8091 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 666613476 is about 25818.8589213389. The cubic root of 666613476 is about 873.5572309547.

The spelling of 666613476 in words is "six hundred sixty-six million, six hundred thirteen thousand, four hundred seventy-six".