66315629 has 2 divisors, whose sum is σ = 66315630. Its totient is φ = 66315628.

The previous prime is 66315619. The next prime is 66315653. The reversal of 66315629 is 92651366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54789604 + 11526025 = 7402^2 + 3395^2 .

It is a cyclic number.

It is not a de Polignac number, because 66315629 - 2²⁴ = 49538413 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66315592 and 66315601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66315619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33157814 + 33157815.

It is an arithmetic number, because the mean of its divisors is an integer number (33157815).

Almost surely, 2^66315629 is an apocalyptic number.

It is an amenable number.

66315629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66315629 is an equidigital number, since it uses as much as digits as its factorization.

66315629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 66315629 is about 8143.4408575245. The cubic root of 66315629 is about 404.7671862153.

The spelling of 66315629 in words is "sixty-six million, three hundred fifteen thousand, six hundred twenty-nine".