66952761 has 4 divisors (see below), whose sum is σ = 89270352. Its totient is φ = 44635172.

The previous prime is 66952759. The next prime is 66952771. The reversal of 66952761 is 16725966.

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 66952761 - 2¹ = 66952759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66952741) 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, 11158791 + ... + 11158796.

It is an arithmetic number, because the mean of its divisors is an integer number (22317588).

Almost surely, 2^66952761 is an apocalyptic number.

It is an amenable number.

66952761 is a deficient number, since it is larger than the sum of its proper divisors (22317591).

66952761 is a wasteful number, since it uses less digits than its factorization.

66952761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22317590.

The product of its digits is 136080, while the sum is 42.

The square root of 66952761 is about 8182.4666818753. The cubic root of 66952761 is about 406.0593331390.

The spelling of 66952761 in words is "sixty-six million, nine hundred fifty-two thousand, seven hundred sixty-one".