66226072 has 16 divisors (see below), whose sum is σ = 135462600. Its totient is φ = 30102720.

The previous prime is 66226049. The next prime is 66226079. The reversal of 66226072 is 27062266.

It is a super-2 number, since 2×66226072² = 8771785225098368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66226079) 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, 376197 + ... + 376372.

Almost surely, 2^66226072 is an apocalyptic number.

It is an amenable number.

66226072 is an abundant number, since it is smaller than the sum of its proper divisors (69236528).

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

66226072 is a wasteful number, since it uses less digits than its factorization.

66226072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752586 (or 752582 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 66226072 is about 8137.9402799480. The cubic root of 66226072 is about 404.5848960286.

The spelling of 66226072 in words is "sixty-six million, two hundred twenty-six thousand, seventy-two".