66724097 has 16 divisors (see below), whose sum is σ = 75043584. Its totient is φ = 58800000.

The previous prime is 66724079. The next prime is 66724109. The reversal of 66724097 is 79042766.

It is a cyclic number.

It is not a de Polignac number, because 66724097 - 2⁶ = 66724033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (66724397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88472 + ... + 89222.

It is an arithmetic number, because the mean of its divisors is an integer number (4690224).

Almost surely, 2^66724097 is an apocalyptic number.

It is an amenable number.

66724097 is a deficient number, since it is larger than the sum of its proper divisors (8319487).

66724097 is a wasteful number, since it uses less digits than its factorization.

66724097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 66724097 is about 8168.4819275065. The cubic root of 66724097 is about 405.5965339159.

The spelling of 66724097 in words is "sixty-six million, seven hundred twenty-four thousand, ninety-seven".