86661922 has 4 divisors (see below), whose sum is σ = 129992886. Its totient is φ = 43330960.

The previous prime is 86661901. The next prime is 86661923. The reversal of 86661922 is 22916668.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 84474481 + 2187441 = 9191^2 + 1479^2 .

It is not an unprimeable number, because it can be changed into a prime (86661923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665479 + ... + 21665482.

Almost surely, 2^86661922 is an apocalyptic number.

86661922 is a deficient number, since it is larger than the sum of its proper divisors (43330964).

86661922 is a wasteful number, since it uses less digits than its factorization.

86661922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43330963.

The product of its digits is 62208, while the sum is 40.

The square root of 86661922 is about 9309.2385295469. The cubic root of 86661922 is about 442.5300555197.

The spelling of 86661922 in words is "eighty-six million, six hundred sixty-one thousand, nine hundred twenty-two".