66417472 has 28 divisors (see below), whose sum is σ = 143780256. Its totient is φ = 30189440.

The previous prime is 66417457. The next prime is 66417497. The reversal of 66417472 is 27471466.

It is a super-2 number, since 2×66417472² = 8822561173741568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46468 + ... + 47875.

Almost surely, 2^66417472 is an apocalyptic number.

It is an amenable number.

66417472 is an abundant number, since it is smaller than the sum of its proper divisors (77362784).

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

66417472 is a wasteful number, since it uses less digits than its factorization.

66417472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94366 (or 94356 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 66417472 is about 8149.6915279046. The cubic root of 66417472 is about 404.9742848073.

The spelling of 66417472 in words is "sixty-six million, four hundred seventeen thousand, four hundred seventy-two".