80437666 has 8 divisors (see below), whose sum is σ = 122012460. Its totient is φ = 39766848.

The previous prime is 80437663. The next prime is 80437681. The reversal of 80437666 is 66673408.

It can be written as a sum of positive squares in 2 ways, for example, as 74459641 + 5978025 = 8629^2 + 2445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×80437666² = 12940436223055112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80437663) 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, 225771 + ... + 226126.

Almost surely, 2^80437666 is an apocalyptic number.

80437666 is a deficient number, since it is larger than the sum of its proper divisors (41574794).

80437666 is a wasteful number, since it uses less digits than its factorization.

80437666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451988.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 80437666 is about 8968.7048117329. The cubic root of 80437666 is about 431.6712784217.

The spelling of 80437666 in words is "eighty million, four hundred thirty-seven thousand, six hundred sixty-six".