66054645 has 24 divisors (see below), whose sum is σ = 118190592. Its totient is φ = 34092000.

The previous prime is 66054623. The next prime is 66054647. The reversal of 66054645 is 54645066.

It is a happy number.

66054645 is a `hidden beast` number, since 6 + 6 + 0 + 5 + 4 + 645 = 666.

It is not a de Polignac number, because 66054645 - 2⁵ = 66054613 is a prime.

It is a super-2 number, since 2×66054645² = 8726432252152050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66054647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22281 + ... + 25070.

It is an arithmetic number, because the mean of its divisors is an integer number (4924608).

Almost surely, 2^66054645 is an apocalyptic number.

It is an amenable number.

66054645 is a deficient number, since it is larger than the sum of its proper divisors (52135947).

66054645 is a wasteful number, since it uses less digits than its factorization.

66054645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47393 (or 47390 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 66054645 is about 8127.4008760489. The cubic root of 66054645 is about 404.2355033967.

The spelling of 66054645 in words is "sixty-six million, fifty-four thousand, six hundred forty-five".