66766701 has 16 divisors (see below), whose sum is σ = 95860800. Its totient is φ = 41180928.

The previous prime is 66766691. The next prime is 66766709. The reversal of 66766701 is 10766766.

It is not a de Polignac number, because 66766701 - 2⁵ = 66766669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66766701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66766709) 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, 8086 + ... + 14103.

It is an arithmetic number, because the mean of its divisors is an integer number (5991300).

Almost surely, 2^66766701 is an apocalyptic number.

It is an amenable number.

66766701 is a deficient number, since it is larger than the sum of its proper divisors (29094099).

66766701 is a wasteful number, since it uses less digits than its factorization.

66766701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22268.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66766701 is about 8171.0893398616. The cubic root of 66766701 is about 405.6828413570.

The spelling of 66766701 in words is "sixty-six million, seven hundred sixty-six thousand, seven hundred one".