66698272 has 24 divisors (see below), whose sum is σ = 134863596. Its totient is φ = 32447232.

The previous prime is 66698243. The next prime is 66698273. The reversal of 66698272 is 27289666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 698896 = 8124^2 + 836^2 .

It is not an unprimeable number, because it can be changed into a prime (66698273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26983 + ... + 29350.

Almost surely, 2^66698272 is an apocalyptic number.

It is an amenable number.

66698272 is an abundant number, since it is smaller than the sum of its proper divisors (68165324).

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

66698272 is a wasteful number, since it uses less digits than its factorization.

66698272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56380 (or 56372 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 66698272 is about 8166.9010034407. The cubic root of 66698272 is about 405.5441995889.

It can be divided in two parts, 6669 and 8272, that added together give a palindrome (14941).

The spelling of 66698272 in words is "sixty-six million, six hundred ninety-eight thousand, two hundred seventy-two".