874071661 has 4 divisors (see below), whose sum is σ = 895390524. Its totient is φ = 852752800.

The previous prime is 874071647. The next prime is 874071733. The reversal of 874071661 is 166170478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13764100 + 860307561 = 3710^2 + 29331^2 .

It is a cyclic number.

It is not a de Polignac number, because 874071661 - 2⁷ = 874071533 is a prime.

It is a super-3 number, since 3×874071661³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (874071641) 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, 10659370 + ... + 10659451.

It is an arithmetic number, because the mean of its divisors is an integer number (223847631).

Almost surely, 2^874071661 is an apocalyptic number.

It is an amenable number.

874071661 is a deficient number, since it is larger than the sum of its proper divisors (21318863).

874071661 is a wasteful number, since it uses less digits than its factorization.

874071661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21318862.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 874071661 is about 29564.7029580884. The cubic root of 874071661 is about 956.1272148098.

The spelling of 874071661 in words is "eight hundred seventy-four million, seventy-one thousand, six hundred sixty-one".