66612364 has 54 divisors (see below), whose sum is σ = 146910204. Its totient is φ = 26339040.

The previous prime is 66612349. The next prime is 66612367. The reversal of 66612364 is 46321666.

It is not an unprimeable number, because it can be changed into a prime (66612367) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32119 + ... + 34129.

Almost surely, 2^66612364 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 66612364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73455102).

66612364 is an abundant number, since it is smaller than the sum of its proper divisors (80297840).

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

66612364 is a wasteful number, since it uses less digits than its factorization.

66612364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 2033 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 66612364 is about 8161.6397862194. The cubic root of 66612364 is about 405.3700098704.

It can be divided in two parts, 6661 and 2364, that added together give a square (9025 = 95²).

The spelling of 66612364 in words is "sixty-six million, six hundred twelve thousand, three hundred sixty-four".