66982305 has 24 divisors (see below), whose sum is σ = 116054208. Its totient is φ = 32974656.

The previous prime is 66982303. The next prime is 66982309. The reversal of 66982305 is 50328966.

It is not a de Polignac number, because 66982305 - 2¹ = 66982303 is a prime.

It is a super-2 number, since 2×66982305² = 8973258366226050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (66982303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10677 + ... + 15746.

It is an arithmetic number, because the mean of its divisors is an integer number (4835592).

Almost surely, 2^66982305 is an apocalyptic number.

66982305 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66982305 is a deficient number, since it is larger than the sum of its proper divisors (49071903).

66982305 is a wasteful number, since it uses less digits than its factorization.

66982305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26457 (or 26444 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 66982305 is about 8184.2718063368. The cubic root of 66982305 is about 406.1190511284.

The spelling of 66982305 in words is "sixty-six million, nine hundred eighty-two thousand, three hundred five".