86249666 has 4 divisors (see below), whose sum is σ = 129374502. Its totient is φ = 43124832.

The previous prime is 86249659. The next prime is 86249689. The reversal of 86249666 is 66694268.

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., 82719025 + 3530641 = 9095^2 + 1879^2 .

It is a super-2 number, since 2×86249666² = 14878009770223112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86249666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21562415 + ... + 21562418.

Almost surely, 2^86249666 is an apocalyptic number.

86249666 is a deficient number, since it is larger than the sum of its proper divisors (43124836).

86249666 is a wasteful number, since it uses less digits than its factorization.

86249666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43124835.

The product of its digits is 746496, while the sum is 47.

The square root of 86249666 is about 9287.0698285304. The cubic root of 86249666 is about 441.8272257987.

The spelling of 86249666 in words is "eighty-six million, two hundred forty-nine thousand, six hundred sixty-six".