66151722 has 32 divisors (see below), whose sum is σ = 162836352. Its totient is φ = 17446464.

The previous prime is 66151721. The next prime is 66151727. The reversal of 66151722 is 22715166.

It is a self number, because there is not a number n which added to its sum of digits gives 66151722.

It is not an unprimeable number, because it can be changed into a prime (66151721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60033 + ... + 61124.

It is an arithmetic number, because the mean of its divisors is an integer number (5088636).

Almost surely, 2^66151722 is an apocalyptic number.

66151722 is an abundant number, since it is smaller than the sum of its proper divisors (96684630).

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

66151722 is a wasteful number, since it uses less digits than its factorization.

66151722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121182.

The product of its digits is 5040, while the sum is 30.

The square root of 66151722 is about 8133.3708878914. The cubic root of 66151722 is about 404.4334342750.

Adding to 66151722 its reverse (22715166), we get a palindrome (88866888).

The spelling of 66151722 in words is "sixty-six million, one hundred fifty-one thousand, seven hundred twenty-two".