65674721 has 4 divisors (see below), whose sum is σ = 75056832. Its totient is φ = 56292612.

The previous prime is 65674699. The next prime is 65674727. The reversal of 65674721 is 12747656.

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 a cyclic number.

It is not a de Polignac number, because 65674721 - 2⁶ = 65674657 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65674727) 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, 4691045 + ... + 4691058.

It is an arithmetic number, because the mean of its divisors is an integer number (18764208).

Almost surely, 2^65674721 is an apocalyptic number.

It is an amenable number.

65674721 is a deficient number, since it is larger than the sum of its proper divisors (9382111).

65674721 is an equidigital number, since it uses as much as digits as its factorization.

65674721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382110.

The product of its digits is 70560, while the sum is 38.

The square root of 65674721 is about 8103.9941386948. The cubic root of 65674721 is about 403.4590040893.

The spelling of 65674721 in words is "sixty-five million, six hundred seventy-four thousand, seven hundred twenty-one".