66911607741 has 16 divisors (see below), whose sum is σ = 97347532608. Its totient is φ = 40543507200.

The previous prime is 66911607739. The next prime is 66911607761. The reversal of 66911607741 is 14770611966.

It is not a de Polignac number, because 66911607741 - 2¹ = 66911607739 is a prime.

It is a super-2 number, since 2×66911607741² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66911607701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71766 + ... + 372791.

It is an arithmetic number, because the mean of its divisors is an integer number (6084220788).

Almost surely, 2^66911607741 is an apocalyptic number.

It is an amenable number.

66911607741 is a deficient number, since it is larger than the sum of its proper divisors (30435924867).

66911607741 is a wasteful number, since it uses less digits than its factorization.

66911607741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449132.

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 66911607741 in words is "sixty-six billion, nine hundred eleven million, six hundred seven thousand, seven hundred forty-one".