80087661 has 6 divisors (see below), whose sum is σ = 115682190. Its totient is φ = 53391768.

The previous prime is 80087659. The next prime is 80087699. The reversal of 80087661 is 16678008.

It can be written as a sum of positive squares in only one way, i.e., 79762761 + 324900 = 8931^2 + 570^2 .

It is not a de Polignac number, because 80087661 - 2¹ = 80087659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80087461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4449306 + ... + 4449323.

It is an arithmetic number, because the mean of its divisors is an integer number (19280365).

Almost surely, 2^80087661 is an apocalyptic number.

It is an amenable number.

80087661 is a deficient number, since it is larger than the sum of its proper divisors (35594529).

80087661 is a wasteful number, since it uses less digits than its factorization.

80087661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8898635 (or 8898632 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 80087661 is about 8949.1709671902. The cubic root of 80087661 is about 431.0442638059.

The spelling of 80087661 in words is "eighty million, eighty-seven thousand, six hundred sixty-one".