66652641 has 24 divisors (see below), whose sum is σ = 107018496. Its totient is φ = 39630240.

The previous prime is 66652633. The next prime is 66652661. The reversal of 66652641 is 14625666.

It is a happy number.

It is not a de Polignac number, because 66652641 - 2³ = 66652633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66652596 and 66652605.

It is not an unprimeable number, because it can be changed into a prime (66652601) 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, 1105 + ... + 11598.

It is an arithmetic number, because the mean of its divisors is an integer number (4459104).

Almost surely, 2^66652641 is an apocalyptic number.

It is an amenable number.

66652641 is a deficient number, since it is larger than the sum of its proper divisors (40365855).

66652641 is a wasteful number, since it uses less digits than its factorization.

66652641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12773 (or 12770 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66652641 is about 8164.1068709321. The cubic root of 66652641 is about 405.4516953979.

The spelling of 66652641 in words is "sixty-six million, six hundred fifty-two thousand, six hundred forty-one".