65940977 has 16 divisors (see below), whose sum is σ = 73446912. Its totient is φ = 58882560.

The previous prime is 65940971. The next prime is 65940989. The reversal of 65940977 is 77904956.

It is not a de Polignac number, because 65940977 - 2⁴ = 65940961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65940971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52952 + ... + 54182.

It is an arithmetic number, because the mean of its divisors is an integer number (4590432).

Almost surely, 2^65940977 is an apocalyptic number.

It is an amenable number.

65940977 is a deficient number, since it is larger than the sum of its proper divisors (7505935).

65940977 is a wasteful number, since it uses less digits than its factorization.

65940977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 65940977 is about 8120.4049775858. The cubic root of 65940977 is about 404.0034984012.

The spelling of 65940977 in words is "sixty-five million, nine hundred forty thousand, nine hundred seventy-seven".