66440262 has 16 divisors (see below), whose sum is σ = 151863552. Its totient is φ = 18982920.

The previous prime is 66440251. The next prime is 66440263. The reversal of 66440262 is 26204466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66440263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790914 + ... + 790997.

It is an arithmetic number, because the mean of its divisors is an integer number (9491472).

Almost surely, 2^66440262 is an apocalyptic number.

66440262 is an abundant number, since it is smaller than the sum of its proper divisors (85423290).

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

66440262 is a wasteful number, since it uses less digits than its factorization.

66440262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581923.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 66440262 is about 8151.0896204127. The cubic root of 66440262 is about 405.0205994704.

The spelling of 66440262 in words is "sixty-six million, four hundred forty thousand, two hundred sixty-two".