83661308 has 6 divisors (see below), whose sum is σ = 146407296. Its totient is φ = 41830652.

The previous prime is 83661307. The next prime is 83661337. The reversal of 83661308 is 80316638.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83661307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10457660 + ... + 10457667.

It is an arithmetic number, because the mean of its divisors is an integer number (24401216).

Almost surely, 2^83661308 is an apocalyptic number.

It is an amenable number.

83661308 is a deficient number, since it is larger than the sum of its proper divisors (62745988).

83661308 is a wasteful number, since it uses less digits than its factorization.

83661308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20915331 (or 20915329 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 83661308 is about 9146.6555636473. The cubic root of 83661308 is about 437.3625067809.

The spelling of 83661308 in words is "eighty-three million, six hundred sixty-one thousand, three hundred eight".