66736703373705 has 96 divisors (see below), whose sum is σ = 118590013301760. Its totient is φ = 34702511754240.

The previous prime is 66736703373701. The next prime is 66736703373709. The reversal of 66736703373705 is 50737330763766.

It is a happy number.

66736703373705 is a `hidden beast` number, since 66 + 73 + 6 + 70 + 3 + 373 + 70 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (66736703373701) and next prime (66736703373709).

It is not a de Polignac number, because 66736703373705 - 2² = 66736703373701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66736703373701) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1113566181 + ... + 1113626109.

It is an arithmetic number, because the mean of its divisors is an integer number (1235312638560).

Almost surely, 2^{66736703373705} is an apocalyptic number.

It is an amenable number.

66736703373705 is a deficient number, since it is larger than the sum of its proper divisors (51853309928055).

66736703373705 is a wasteful number, since it uses less digits than its factorization.

66736703373705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61991 (or 61988 counting only the distinct ones).

The product of its (nonzero) digits is 210039480, while the sum is 63.

The spelling of 66736703373705 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred three million, three hundred seventy-three thousand, seven hundred five".