66736740337 has 4 divisors (see below), whose sum is σ = 66738298176. Its totient is φ = 66735182500.

The previous prime is 66736740311. The next prime is 66736740349. The reversal of 66736740337 is 73304763766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66736740337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66736740397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712789 + ... + 800962.

It is an arithmetic number, because the mean of its divisors is an integer number (16684574544).

Almost surely, 2^66736740337 is an apocalyptic number.

It is an amenable number.

66736740337 is a deficient number, since it is larger than the sum of its proper divisors (1557839).

66736740337 is a wasteful number, since it uses less digits than its factorization.

66736740337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557838.

The product of its (nonzero) digits is 8001504, while the sum is 52.

The spelling of 66736740337 in words is "sixty-six billion, seven hundred thirty-six million, seven hundred forty thousand, three hundred thirty-seven".