65478779739 has 6 divisors (see below), whose sum is σ = 94580459636. Its totient is φ = 43652519820.

The previous prime is 65478779699. The next prime is 65478779783. The reversal of 65478779739 is 93797787456.

65478779739 is a `hidden beast` number, since 6 + 547 + 8 + 7 + 7 + 9 + 73 + 9 = 666.

It is not a de Polignac number, because 65478779739 - 2¹¹ = 65478777691 is a prime.

It is a super-2 number, since 2×65478779739² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65478779789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3637709977 + ... + 3637709994.

Almost surely, 2^65478779739 is an apocalyptic number.

65478779739 is a deficient number, since it is larger than the sum of its proper divisors (29101679897).

65478779739 is a wasteful number, since it uses less digits than its factorization.

65478779739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275419977 (or 7275419974 counting only the distinct ones).

The product of its digits is 560105280, while the sum is 72.

The spelling of 65478779739 in words is "sixty-five billion, four hundred seventy-eight million, seven hundred seventy-nine thousand, seven hundred thirty-nine".