66669472 has 12 divisors (see below), whose sum is σ = 131255586. Its totient is φ = 33334720.

The previous prime is 66669467. The next prime is 66669481. The reversal of 66669472 is 27496666.

It can be written as a sum of positive squares in only one way, i.e., 50637456 + 16032016 = 7116^2 + 4004^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1041679 + ... + 1041742.

Almost surely, 2^66669472 is an apocalyptic number.

It is an amenable number.

66669472 is a deficient number, since it is larger than the sum of its proper divisors (64586114).

66669472 is a wasteful number, since it uses less digits than its factorization.

66669472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083431 (or 2083423 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 66669472 is about 8165.1375983507. The cubic root of 66669472 is about 405.4858204931.

The spelling of 66669472 in words is "sixty-six million, six hundred sixty-nine thousand, four hundred seventy-two".