66660763 has 8 divisors (see below), whose sum is σ = 74264400. Its totient is φ = 59410848.

The previous prime is 66660761. The next prime is 66660773. The reversal of 66660763 is 36706666.

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 66660763 - 2¹ = 66660761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66660761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88033 + ... + 88786.

It is an arithmetic number, because the mean of its divisors is an integer number (9283050).

Almost surely, 2^66660763 is an apocalyptic number.

66660763 is a deficient number, since it is larger than the sum of its proper divisors (7603637).

66660763 is a wasteful number, since it uses less digits than its factorization.

66660763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176861.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 66660763 is about 8164.6042769996. The cubic root of 66660763 is about 405.4681635872.

The spelling of 66660763 in words is "sixty-six million, six hundred sixty thousand, seven hundred sixty-three".