66055607 has 2 divisors, whose sum is σ = 66055608. Its totient is φ = 66055606.

The previous prime is 66055603. The next prime is 66055643. The reversal of 66055607 is 70655066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66055607 - 2² = 66055603 is a prime.

It is a super-2 number, since 2×66055607² = 8726686432276898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66055603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33027803 + 33027804.

It is an arithmetic number, because the mean of its divisors is an integer number (33027804).

Almost surely, 2^66055607 is an apocalyptic number.

66055607 is a deficient number, since it is larger than the sum of its proper divisors (1).

66055607 is an equidigital number, since it uses as much as digits as its factorization.

66055607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 66055607 is about 8127.4600583454. The cubic root of 66055607 is about 404.2374657753.

The spelling of 66055607 in words is "sixty-six million, fifty-five thousand, six hundred seven".