66501737361 has 12 divisors (see below), whose sum is σ = 98654229492. Its totient is φ = 43136261856.

The previous prime is 66501737321. The next prime is 66501737363. The reversal of 66501737361 is 16373710566.

66501737361 is a `hidden beast` number, since 6 + 6 + 501 + 73 + 73 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30956291136 + 35545446225 = 175944^2 + 188535^2 .

It is not a de Polignac number, because 66501737361 - 2⁷ = 66501737233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66501737363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99852126 + ... + 99852791.

It is an arithmetic number, because the mean of its divisors is an integer number (8221185791).

Almost surely, 2^66501737361 is an apocalyptic number.

It is an amenable number.

66501737361 is a deficient number, since it is larger than the sum of its proper divisors (32152492131).

66501737361 is a wasteful number, since it uses less digits than its factorization.

66501737361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199704960 (or 199704957 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The spelling of 66501737361 in words is "sixty-six billion, five hundred one million, seven hundred thirty-seven thousand, three hundred sixty-one".