66958701 has 4 divisors (see below), whose sum is σ = 89278272. Its totient is φ = 44639132.

The previous prime is 66958693. The next prime is 66958711. The reversal of 66958701 is 10785966.

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 66958701 - 2³ = 66958693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66958711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11159781 + ... + 11159786.

It is an arithmetic number, because the mean of its divisors is an integer number (22319568).

Almost surely, 2^66958701 is an apocalyptic number.

It is an amenable number.

66958701 is a deficient number, since it is larger than the sum of its proper divisors (22319571).

66958701 is a wasteful number, since it uses less digits than its factorization.

66958701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22319570.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 66958701 is about 8182.8296450556. The cubic root of 66958701 is about 406.0713412130.

The spelling of 66958701 in words is "sixty-six million, nine hundred fifty-eight thousand, seven hundred one".