66650676 has 48 divisors (see below), whose sum is σ = 166561920. Its totient is φ = 20669440.

The previous prime is 66650629. The next prime is 66650681. The reversal of 66650676 is 67605666.

It is a super-2 number, since 2×66650676² = 8884625222513952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16321 + ... + 19991.

It is an arithmetic number, because the mean of its divisors is an integer number (3470040).

Almost surely, 2^66650676 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 66650676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83280960).

66650676 is an abundant number, since it is smaller than the sum of its proper divisors (99911244).

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

66650676 is a wasteful number, since it uses less digits than its factorization.

66650676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784 (or 3782 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 66650676 is about 8163.9865262015. The cubic root of 66650676 is about 405.4477109576.

The spelling of 66650676 in words is "sixty-six million, six hundred fifty thousand, six hundred seventy-six".