66779307 has 36 divisors (see below), whose sum is σ = 113017320. Its totient is φ = 37884672.

The previous prime is 66779299. The next prime is 66779333. The reversal of 66779307 is 70397766.

It is not a de Polignac number, because 66779307 - 2³ = 66779299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66779107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 71419 + ... + 72347.

It is an arithmetic number, because the mean of its divisors is an integer number (3139370).

Almost surely, 2^66779307 is an apocalyptic number.

66779307 is a deficient number, since it is larger than the sum of its proper divisors (46238013).

66779307 is a wasteful number, since it uses less digits than its factorization.

66779307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 333396, while the sum is 45.

The square root of 66779307 is about 8171.8606816318. The cubic root of 66779307 is about 405.7083716288.

The spelling of 66779307 in words is "sixty-six million, seven hundred seventy-nine thousand, three hundred seven".