87069661 has 4 divisors (see below), whose sum is σ = 99508192. Its totient is φ = 74631132.

The previous prime is 87069659. The next prime is 87069667. The reversal of 87069661 is 16696078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87069661 - 2¹ = 87069659 is a prime.

It is a super-2 number, since 2×87069661² = 15162251733309842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87069667) 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, 6219255 + ... + 6219268.

It is an arithmetic number, because the mean of its divisors is an integer number (24877048).

Almost surely, 2^87069661 is an apocalyptic number.

It is an amenable number.

87069661 is a deficient number, since it is larger than the sum of its proper divisors (12438531).

87069661 is a wasteful number, since it uses less digits than its factorization.

87069661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12438530.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 87069661 is about 9331.1125274535. The cubic root of 87069661 is about 443.2229954493. Note that the first 3 decimals are identical.

The spelling of 87069661 in words is "eighty-seven million, sixty-nine thousand, six hundred sixty-one".