66779315 has 16 divisors (see below), whose sum is σ = 87778080. Its totient is φ = 48545280.

The previous prime is 66779299. The next prime is 66779333. The reversal of 66779315 is 51397766.

It is not a de Polignac number, because 66779315 - 2⁴ = 66779299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11081 + ... + 16010.

It is an arithmetic number, because the mean of its divisors is an integer number (5486130).

Almost surely, 2^66779315 is an apocalyptic number.

66779315 is a deficient number, since it is larger than the sum of its proper divisors (20998765).

66779315 is a wasteful number, since it uses less digits than its factorization.

66779315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27142.

The product of its digits is 238140, while the sum is 44.

The square root of 66779315 is about 8171.8611711164. The cubic root of 66779315 is about 405.7083878298.

The spelling of 66779315 in words is "sixty-six million, seven hundred seventy-nine thousand, three hundred fifteen".