66247011 has 32 divisors (see below), whose sum is σ = 105019200. Its totient is φ = 41126400.

The previous prime is 66247003. The next prime is 66247019. The reversal of 66247011 is 11074266.

It is an interprime number because it is at equal distance from previous prime (66247003) and next prime (66247019).

It is not a de Polignac number, because 66247011 - 2³ = 66247003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (66247019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45645 + ... + 47073.

It is an arithmetic number, because the mean of its divisors is an integer number (3281850).

Almost surely, 2^66247011 is an apocalyptic number.

66247011 is a deficient number, since it is larger than the sum of its proper divisors (38772189).

66247011 is a wasteful number, since it uses less digits than its factorization.

66247011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 66247011 is about 8139.2266831684. The cubic root of 66247011 is about 404.6275313544.

The spelling of 66247011 in words is "sixty-six million, two hundred forty-seven thousand, eleven".