66052639 has 2 divisors, whose sum is σ = 66052640. Its totient is φ = 66052638.

The previous prime is 66052631. The next prime is 66052643. The reversal of 66052639 is 93625066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66052639 - 2³ = 66052631 is a prime.

It is a super-2 number, since 2×66052639² = 8725902237728642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66052598 and 66052607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66052631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33026319 + 33026320.

It is an arithmetic number, because the mean of its divisors is an integer number (33026320).

Almost surely, 2^66052639 is an apocalyptic number.

66052639 is a deficient number, since it is larger than the sum of its proper divisors (1).

66052639 is an equidigital number, since it uses as much as digits as its factorization.

66052639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 66052639 is about 8127.2774654247. The cubic root of 66052639 is about 404.2314113068.

The spelling of 66052639 in words is "sixty-six million, fifty-two thousand, six hundred thirty-nine".