66761005 has 8 divisors (see below), whose sum is σ = 80690400. Its totient is φ = 53024016.

The previous prime is 66760999. The next prime is 66761017. The reversal of 66761005 is 50016766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66761005 - 2²¹ = 64663853 is a prime.

It is a super-2 number, since 2×66761005² = 8914063577220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47335 + ... + 48724.

It is an arithmetic number, because the mean of its divisors is an integer number (10086300).

Almost surely, 2^66761005 is an apocalyptic number.

It is an amenable number.

66761005 is a deficient number, since it is larger than the sum of its proper divisors (13929395).

66761005 is a wasteful number, since it uses less digits than its factorization.

66761005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96203.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 66761005 is about 8170.7407864893. The cubic root of 66761005 is about 405.6713044923.

The spelling of 66761005 in words is "sixty-six million, seven hundred sixty-one thousand, five".