82012666 has 4 divisors (see below), whose sum is σ = 123019002. Its totient is φ = 41006332.

The previous prime is 82012661. The next prime is 82012703. The reversal of 82012666 is 66621028.

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., 50708641 + 31304025 = 7121^2 + 5595^2 .

It is not an unprimeable number, because it can be changed into a prime (82012661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20503165 + ... + 20503168.

Almost surely, 2^82012666 is an apocalyptic number.

82012666 is a deficient number, since it is larger than the sum of its proper divisors (41006336).

82012666 is a wasteful number, since it uses less digits than its factorization.

82012666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41006335.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 82012666 is about 9056.0844739876. The cubic root of 82012666 is about 434.4705162067.

The spelling of 82012666 in words is "eighty-two million, twelve thousand, six hundred sixty-six".