87727661 has 8 divisors (see below), whose sum is σ = 100336320. Its totient is φ = 75138048.

The previous prime is 87727649. The next prime is 87727711. The reversal of 87727661 is 16672778.

87727661 = T₅₀₀₃ + T₅₀₀₄ + ... + T₅₀₀₉.

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 87727661 - 2¹⁰ = 87726637 is a prime.

It is a super-2 number, since 2×87727661² = 15392285009061842, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87727061) 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, 7085 + ... + 15021.

It is an arithmetic number, because the mean of its divisors is an integer number (12542040).

Almost surely, 2^87727661 is an apocalyptic number.

It is an amenable number.

87727661 is a deficient number, since it is larger than the sum of its proper divisors (12608659).

87727661 is a wasteful number, since it uses less digits than its factorization.

87727661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523.

The product of its digits is 197568, while the sum is 44.

The square root of 87727661 is about 9366.3045540918. The cubic root of 87727661 is about 444.3366981150.

It can be divided in two parts, 87727 and 661, that added together give a palindrome (88388).

The spelling of 87727661 in words is "eighty-seven million, seven hundred twenty-seven thousand, six hundred sixty-one".