66533676 has 48 divisors (see below), whose sum is σ = 172155648. Its totient is φ = 19828800.

The previous prime is 66533671. The next prime is 66533681. The reversal of 66533676 is 67633566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66533671) and next prime (66533681).

It is not an unprimeable number, because it can be changed into a prime (66533671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3921 + ... + 12183.

It is an arithmetic number, because the mean of its divisors is an integer number (3586576).

Almost surely, 2^66533676 is an apocalyptic number.

66533676 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66533676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86077824).

66533676 is an abundant number, since it is smaller than the sum of its proper divisors (105621972).

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

66533676 is a wasteful number, since it uses less digits than its factorization.

66533676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342 (or 8340 counting only the distinct ones).

The product of its digits is 408240, while the sum is 42.

The square root of 66533676 is about 8156.8177618481. The cubic root of 66533676 is about 405.2103281849.

The spelling of 66533676 in words is "sixty-six million, five hundred thirty-three thousand, six hundred seventy-six".