66047523320457 has 36 divisors (see below), whose sum is σ = 111073235897520. Its totient is φ = 37708989805872.

The previous prime is 66047523320453. The next prime is 66047523320479. The reversal of 66047523320457 is 75402332574066.

66047523320457 is a `hidden beast` number, since 6 + 6 + 0 + 47 + 523 + 3 + 20 + 4 + 57 = 666.

It is not a de Polignac number, because 66047523320457 - 2² = 66047523320453 is a prime.

It is a super-2 number, since 2×66047523320457² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66047523320453) 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, 63875607 + ... + 64901372.

It is an arithmetic number, because the mean of its divisors is an integer number (3085367663820).

Almost surely, 2^{66047523320457} is an apocalyptic number.

It is an amenable number.

66047523320457 is a deficient number, since it is larger than the sum of its proper divisors (45025712577063).

66047523320457 is a wasteful number, since it uses less digits than its factorization.

66047523320457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128778162 (or 128778152 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 54.

The spelling of 66047523320457 in words is "sixty-six trillion, forty-seven billion, five hundred twenty-three million, three hundred twenty thousand, four hundred fifty-seven".