65940986 has 4 divisors (see below), whose sum is σ = 98911482. Its totient is φ = 32970492.

The previous prime is 65940971. The next prime is 65940989. The reversal of 65940986 is 68904956.

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., 58997761 + 6943225 = 7681^2 + 2635^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65940986.

It is not an unprimeable number, because it can be changed into a prime (65940989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16485245 + ... + 16485248.

Almost surely, 2^65940986 is an apocalyptic number.

65940986 is a deficient number, since it is larger than the sum of its proper divisors (32970496).

65940986 is a wasteful number, since it uses less digits than its factorization.

65940986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32970495.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 65940986 is about 8120.4055317453. The cubic root of 65940986 is about 404.0035167815.

The spelling of 65940986 in words is "sixty-five million, nine hundred forty thousand, nine hundred eighty-six".