66958107 has 16 divisors (see below), whose sum is σ = 90464640. Its totient is φ = 44049600.

The previous prime is 66958091. The next prime is 66958141. The reversal of 66958107 is 70185966.

It is not a de Polignac number, because 66958107 - 2⁴ = 66958091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66958007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87607 + ... + 88367.

It is an arithmetic number, because the mean of its divisors is an integer number (5654040).

Almost surely, 2^66958107 is an apocalyptic number.

66958107 is a deficient number, since it is larger than the sum of its proper divisors (23506533).

66958107 is a wasteful number, since it uses less digits than its factorization.

66958107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 66958107 is about 8182.7933494620. The cubic root of 66958107 is about 406.0701404375.

The spelling of 66958107 in words is "sixty-six million, nine hundred fifty-eight thousand, one hundred seven".