66021060 has 96 divisors (see below), whose sum is σ = 212631552. Its totient is φ = 14993280.

The previous prime is 66021037. The next prime is 66021071. The reversal of 66021060 is 6012066.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79809 + ... + 80631.

It is an arithmetic number, because the mean of its divisors is an integer number (2214912).

Almost surely, 2^66021060 is an apocalyptic number.

66021060 is a gapful number since it is divisible by the number (60) 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 66021060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106315776).

66021060 is an abundant number, since it is smaller than the sum of its proper divisors (146610492).

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

66021060 is a wasteful number, since it uses less digits than its factorization.

66021060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 66021060 is about 8125.3344546548. The cubic root of 66021060 is about 404.1669815895.

The spelling of 66021060 in words is "sixty-six million, twenty-one thousand, sixty".