66026900 has 108 divisors (see below), whose sum is σ = 158739840. Its totient is φ = 23803200.

The previous prime is 66026897. The next prime is 66026911. The reversal of 66026900 is 962066.

It is a happy number.

It is a super-2 number, since 2×66026900² = 8719103047220000, 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 35 ways as a sum of consecutive naturals, for example, 1119071 + ... + 1119129.

Almost surely, 2^66026900 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 66026900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79369920).

66026900 is an abundant number, since it is smaller than the sum of its proper divisors (92712940).

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

66026900 is a wasteful number, since it uses less digits than its factorization.

66026900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66026900 is about 8125.6938165304. The cubic root of 66026900 is about 404.1788983202.

Adding to 66026900 its reverse (962066), we get a palindrome (66988966).

The spelling of 66026900 in words is "sixty-six million, twenty-six thousand, nine hundred".