66287922 has 16 divisors (see below), whose sum is σ = 139553760. Its totient is φ = 20932992.

The previous prime is 66287917. The next prime is 66287927. The reversal of 66287922 is 22978266.

It is an interprime number because it is at equal distance from previous prime (66287917) and next prime (66287927).

It is a super-4 number, since 4×66287922⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (66287927) 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, 290623 + ... + 290850.

It is an arithmetic number, because the mean of its divisors is an integer number (8722110).

Almost surely, 2^66287922 is an apocalyptic number.

66287922 is an abundant number, since it is smaller than the sum of its proper divisors (73265838).

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

66287922 is a wasteful number, since it uses less digits than its factorization.

66287922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581497.

The product of its digits is 145152, while the sum is 42.

The square root of 66287922 is about 8141.7394947272. The cubic root of 66287922 is about 404.7108071141.

The spelling of 66287922 in words is "sixty-six million, two hundred eighty-seven thousand, nine hundred twenty-two".