65400761 has 4 divisors (see below), whose sum is σ = 65490000. Its totient is φ = 65311524.

The previous prime is 65400749. The next prime is 65400787. The reversal of 65400761 is 16700456.

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 a de Polignac number, because none of the positive numbers 2^k-65400761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65400791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43511 + ... + 44988.

It is an arithmetic number, because the mean of its divisors is an integer number (16372500).

Almost surely, 2^65400761 is an apocalyptic number.

It is an amenable number.

65400761 is a deficient number, since it is larger than the sum of its proper divisors (89239).

65400761 is an equidigital number, since it uses as much as digits as its factorization.

65400761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89238.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 65400761 is about 8087.0736981927. The cubic root of 65400761 is about 402.8972167567.

The spelling of 65400761 in words is "sixty-five million, four hundred thousand, seven hundred sixty-one".