65678988 has 24 divisors (see below), whose sum is σ = 153644400. Its totient is φ = 21836800.

The previous prime is 65678983. The next prime is 65678993. The reversal of 65678988 is 88987656.

It is an interprime number because it is at equal distance from previous prime (65678983) and next prime (65678993).

It is not an unprimeable number, because it can be changed into a prime (65678983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2013 + ... + 11636.

It is an arithmetic number, because the mean of its divisors is an integer number (6401850).

Almost surely, 2^65678988 is an apocalyptic number.

It is an amenable number.

65678988 is an abundant number, since it is smaller than the sum of its proper divisors (87965412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65678988 is a wasteful number, since it uses less digits than its factorization.

65678988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14057 (or 14055 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The square root of 65678988 is about 8104.2573996635. The cubic root of 65678988 is about 403.4677417094.

It can be divided in two parts, 65678 and 988, that added together give a palindrome (66666).

The spelling of 65678988 in words is "sixty-five million, six hundred seventy-eight thousand, nine hundred eighty-eight".