66830761 has 16 divisors (see below), whose sum is σ = 72345600. Its totient is φ = 61588800.

The previous prime is 66830759. The next prime is 66830773. The reversal of 66830761 is 16703866.

It is a cyclic number.

It is not a de Polignac number, because 66830761 - 2¹ = 66830759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66830761.

It is not an unprimeable number, because it can be changed into a prime (66830161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70551 + ... + 71491.

It is an arithmetic number, because the mean of its divisors is an integer number (4521600).

Almost surely, 2^66830761 is an apocalyptic number.

It is an amenable number.

66830761 is a deficient number, since it is larger than the sum of its proper divisors (5514839).

66830761 is a wasteful number, since it uses less digits than its factorization.

66830761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66830761 is about 8175.0083180386. The cubic root of 66830761 is about 405.8125454128.

The spelling of 66830761 in words is "sixty-six million, eight hundred thirty thousand, seven hundred sixty-one".