66022740 has 144 divisors (see below), whose sum is σ = 232901760. Its totient is φ = 14826240.

The previous prime is 66022667. The next prime is 66022741. The reversal of 66022740 is 4722066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66022741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76431 + ... + 77289.

Almost surely, 2^66022740 is an apocalyptic number.

66022740 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 66022740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116450880).

66022740 is an abundant number, since it is smaller than the sum of its proper divisors (166879020).

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

66022740 is a wasteful number, since it uses less digits than its factorization.

66022740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 66022740 is about 8125.4378343570. The cubic root of 66022740 is about 404.1704097621.

The spelling of 66022740 in words is "sixty-six million, twenty-two thousand, seven hundred forty".