66153401 has 2 divisors, whose sum is σ = 66153402. Its totient is φ = 66153400.

The previous prime is 66153397. The next prime is 66153413. The reversal of 66153401 is 10435166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52940176 + 13213225 = 7276^2 + 3635^2 .

It is a cyclic number.

It is not a de Polignac number, because 66153401 - 2² = 66153397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66153431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33076700 + 33076701.

It is an arithmetic number, because the mean of its divisors is an integer number (33076701).

Almost surely, 2^66153401 is an apocalyptic number.

It is an amenable number.

66153401 is a deficient number, since it is larger than the sum of its proper divisors (1).

66153401 is an equidigital number, since it uses as much as digits as its factorization.

66153401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66153401 is about 8133.4741039730. The cubic root of 66153401 is about 404.4368558941.

Adding to 66153401 its reverse (10435166), we get a palindrome (76588567).

The spelling of 66153401 in words is "sixty-six million, one hundred fifty-three thousand, four hundred one".