66364761 has 4 divisors (see below), whose sum is σ = 88486352. Its totient is φ = 44243172.

The previous prime is 66364757. The next prime is 66364783. The reversal of 66364761 is 16746366.

It is a happy number.

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 not a de Polignac number, because 66364761 - 2² = 66364757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66364261) 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, 11060791 + ... + 11060796.

It is an arithmetic number, because the mean of its divisors is an integer number (22121588).

Almost surely, 2^66364761 is an apocalyptic number.

It is an amenable number.

66364761 is a deficient number, since it is larger than the sum of its proper divisors (22121591).

66364761 is a wasteful number, since it uses less digits than its factorization.

66364761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22121590.

The product of its digits is 108864, while the sum is 39.

The square root of 66364761 is about 8146.4569599305. The cubic root of 66364761 is about 404.8671229994.

The spelling of 66364761 in words is "sixty-six million, three hundred sixty-four thousand, seven hundred sixty-one".