66485651 has 2 divisors, whose sum is σ = 66485652. Its totient is φ = 66485650.

The previous prime is 66485647. The next prime is 66485677. The reversal of 66485651 is 15658466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66485651 - 2² = 66485647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66485599 and 66485608.

It is not a weakly prime, because it can be changed into another prime (66485621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33242825 + 33242826.

It is an arithmetic number, because the mean of its divisors is an integer number (33242826).

Almost surely, 2^66485651 is an apocalyptic number.

66485651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66485651 is an equidigital number, since it uses as much as digits as its factorization.

66485651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 41.

The square root of 66485651 is about 8153.8733740475. The cubic root of 66485651 is about 405.1128090974.

The spelling of 66485651 in words is "sixty-six million, four hundred eighty-five thousand, six hundred fifty-one".