65077977 has 4 divisors (see below), whose sum is σ = 86770640. Its totient is φ = 43385316.

The previous prime is 65077973. The next prime is 65077981. The reversal of 65077977 is 77977056.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (65077973) and next prime (65077981).

It is not a de Polignac number, because 65077977 - 2² = 65077973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65077973) 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, 10846327 + ... + 10846332.

It is an arithmetic number, because the mean of its divisors is an integer number (21692660).

Almost surely, 2^65077977 is an apocalyptic number.

It is an amenable number.

65077977 is a deficient number, since it is larger than the sum of its proper divisors (21692663).

65077977 is a wasteful number, since it uses less digits than its factorization.

65077977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21692662.

The product of its (nonzero) digits is 648270, while the sum is 48.

The square root of 65077977 is about 8067.0922270667. The cubic root of 65077977 is about 402.2332932144.

The spelling of 65077977 in words is "sixty-five million, seventy-seven thousand, nine hundred seventy-seven".