66078479 has 2 divisors, whose sum is σ = 66078480. Its totient is φ = 66078478.

The previous prime is 66078469. The next prime is 66078491. The reversal of 66078479 is 97487066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66078479 - 2¹⁶ = 66012943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66078469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33039239 + 33039240.

It is an arithmetic number, because the mean of its divisors is an integer number (33039240).

Almost surely, 2^66078479 is an apocalyptic number.

66078479 is a deficient number, since it is larger than the sum of its proper divisors (1).

66078479 is an equidigital number, since it uses as much as digits as its factorization.

66078479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 66078479 is about 8128.8670182258. The cubic root of 66078479 is about 404.2841166342.

The spelling of 66078479 in words is "sixty-six million, seventy-eight thousand, four hundred seventy-nine".