74786516661 has 16 divisors (see below), whose sum is σ = 102409485120. Its totient is φ = 48527347200.

The previous prime is 74786516641. The next prime is 74786516681. The reversal of 74786516661 is 16661568747.

It is an interprime number because it is at equal distance from previous prime (74786516641) and next prime (74786516681).

It is not a de Polignac number, because 74786516661 - 2¹³ = 74786508469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74786516641) 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, 2073820 + ... + 2109573.

It is an arithmetic number, because the mean of its divisors is an integer number (6400592820).

Almost surely, 2^74786516661 is an apocalyptic number.

It is an amenable number.

74786516661 is a deficient number, since it is larger than the sum of its proper divisors (27622968459).

74786516661 is a wasteful number, since it uses less digits than its factorization.

74786516661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183556.

The product of its digits is 10160640, while the sum is 57.

The spelling of 74786516661 in words is "seventy-four billion, seven hundred eighty-six million, five hundred sixteen thousand, six hundred sixty-one".