66101663 has 2 divisors, whose sum is σ = 66101664. Its totient is φ = 66101662.

The previous prime is 66101617. The next prime is 66101671. The reversal of 66101663 is 36610166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66101663 - 2²² = 61907359 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66121663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33050831 + 33050832.

It is an arithmetic number, because the mean of its divisors is an integer number (33050832).

Almost surely, 2^66101663 is an apocalyptic number.

66101663 is a deficient number, since it is larger than the sum of its proper divisors (1).

66101663 is an equidigital number, since it uses as much as digits as its factorization.

66101663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66101663 is about 8130.2929221523. The cubic root of 66101663 is about 404.3313928787.

The spelling of 66101663 in words is "sixty-six million, one hundred one thousand, six hundred sixty-three".