66055996 has 6 divisors (see below), whose sum is σ = 115598000. Its totient is φ = 33027996.

The previous prime is 66055993. The next prime is 66056017. The reversal of 66055996 is 69955066.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66055991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8256996 + ... + 8257003.

Almost surely, 2^66055996 is an apocalyptic number.

It is an amenable number.

66055996 is a deficient number, since it is larger than the sum of its proper divisors (49542004).

66055996 is a wasteful number, since it uses less digits than its factorization.

66055996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16514003 (or 16514001 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 46.

The square root of 66055996 is about 8127.4839895259. The cubic root of 66055996 is about 404.2382592889.

The spelling of 66055996 in words is "sixty-six million, fifty-five thousand, nine hundred ninety-six".