66148807 has 2 divisors, whose sum is σ = 66148808. Its totient is φ = 66148806.

The previous prime is 66148781. The next prime is 66148811. The reversal of 66148807 is 70884166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66148807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66148807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66148837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33074403 + 33074404.

It is an arithmetic number, because the mean of its divisors is an integer number (33074404).

Almost surely, 2^66148807 is an apocalyptic number.

66148807 is a deficient number, since it is larger than the sum of its proper divisors (1).

66148807 is an equidigital number, since it uses as much as digits as its factorization.

66148807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 66148807 is about 8133.1916859250. The cubic root of 66148807 is about 404.4274936849.

The spelling of 66148807 in words is "sixty-six million, one hundred forty-eight thousand, eight hundred seven".