66379501 has 2 divisors, whose sum is σ = 66379502. Its totient is φ = 66379500.

The previous prime is 66379447. The next prime is 66379531. The reversal of 66379501 is 10597366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53670276 + 12709225 = 7326^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 66379501 - 2¹³ = 66371309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66379531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33189750 + 33189751.

It is an arithmetic number, because the mean of its divisors is an integer number (33189751).

Almost surely, 2^66379501 is an apocalyptic number.

It is an amenable number.

66379501 is a deficient number, since it is larger than the sum of its proper divisors (1).

66379501 is an equidigital number, since it uses as much as digits as its factorization.

66379501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 66379501 is about 8147.3615974744. The cubic root of 66379501 is about 404.8970952293.

The spelling of 66379501 in words is "sixty-six million, three hundred seventy-nine thousand, five hundred one".