66144396 has 24 divisors (see below), whose sum is σ = 162460480. Its totient is φ = 20887632.

The previous prime is 66144391. The next prime is 66144427. The reversal of 66144396 is 69344166.

It is a super-2 number, since 2×66144396² = 8750162244409632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66144391) 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, 144826 + ... + 145281.

Almost surely, 2^66144396 is an apocalyptic number.

It is an amenable number.

66144396 is an abundant number, since it is smaller than the sum of its proper divisors (96316084).

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

66144396 is a wasteful number, since it uses less digits than its factorization.

66144396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290133 (or 290131 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 66144396 is about 8132.9205086488. The cubic root of 66144396 is about 404.4185040074.

The spelling of 66144396 in words is "sixty-six million, one hundred forty-four thousand, three hundred ninety-six".