66057167405 has 6 divisors (see below), whose sum is σ = 79269290538. Its totient is φ = 52845274160.

The previous prime is 66057167383. The next prime is 66057167417. The reversal of 66057167405 is 50476175066.

It can be written as a sum of positive squares in 3 ways, for example, as 8907961924 + 57149205481 = 94382^2 + 239059^2 .

It is not a de Polignac number, because 66057167405 - 2⁸ = 66057167149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66057167405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 517235 + ... + 632175.

It is an arithmetic number, because the mean of its divisors is an integer number (13211548423).

Almost surely, 2^66057167405 is an apocalyptic number.

It is an amenable number.

66057167405 is a deficient number, since it is larger than the sum of its proper divisors (13212123133).

66057167405 is an frugal number, since it uses more digits than its factorization.

66057167405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229887 (or 114946 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 66057167405 in words is "sixty-six billion, fifty-seven million, one hundred sixty-seven thousand, four hundred five".