65668790 has 32 divisors (see below), whose sum is σ = 136538784. Its totient is φ = 22474240.

The previous prime is 65668787. The next prime is 65668793. The reversal of 65668790 is 9786656.

It is an interprime number because it is at equal distance from previous prime (65668787) and next prime (65668793).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65668793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15689 + ... + 19428.

It is an arithmetic number, because the mean of its divisors is an integer number (4266837).

Almost surely, 2^65668790 is an apocalyptic number.

65668790 is an abundant number, since it is smaller than the sum of its proper divisors (70869994).

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

65668790 is a wasteful number, since it uses less digits than its factorization.

65668790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35152.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 65668790 is about 8103.6281997634. The cubic root of 65668790 is about 403.4468584349.

The spelling of 65668790 in words is "sixty-five million, six hundred sixty-eight thousand, seven hundred ninety".