65940787 has 4 divisors (see below), whose sum is σ = 71935416. Its totient is φ = 59946160.

The previous prime is 65940769. The next prime is 65940829. The reversal of 65940787 is 78704956.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65940787 - 2¹⁹ = 65416499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65940737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997298 + ... + 2997319.

It is an arithmetic number, because the mean of its divisors is an integer number (17983854).

Almost surely, 2^65940787 is an apocalyptic number.

65940787 is a deficient number, since it is larger than the sum of its proper divisors (5994629).

65940787 is a wasteful number, since it uses less digits than its factorization.

65940787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994628.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 65940787 is about 8120.3932786534. The cubic root of 65940787 is about 404.0031103737.

The spelling of 65940787 in words is "sixty-five million, nine hundred forty thousand, seven hundred eighty-seven".