7916361661 has 8 divisors (see below), whose sum is σ = 9026801784. Its totient is φ = 6877562880.

The previous prime is 7916361659. The next prime is 7916361667. The reversal of 7916361661 is 1661636197.

It can be written as a sum of positive squares in 4 ways, for example, as 532224900 + 7384136761 = 23070^2 + 85931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7916361661 - 2¹ = 7916361659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7916361667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17910100 + ... + 17910541.

It is an arithmetic number, because the mean of its divisors is an integer number (1128350223).

Almost surely, 2^7916361661 is an apocalyptic number.

It is an amenable number.

7916361661 is a deficient number, since it is larger than the sum of its proper divisors (1110440123).

7916361661 is a wasteful number, since it uses less digits than its factorization.

7916361661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35820671.

The product of its digits is 244944, while the sum is 46.

The square root of 7916361661 is about 88973.9380998728. The cubic root of 7916361661 is about 1993.0057068619.

The spelling of 7916361661 in words is "seven billion, nine hundred sixteen million, three hundred sixty-one thousand, six hundred sixty-one".