66874797 has 24 divisors (see below), whose sum is σ = 105719328. Its totient is φ = 40399200.

The previous prime is 66874793. The next prime is 66874811. The reversal of 66874797 is 79747866.

It is not a de Polignac number, because 66874797 - 2² = 66874793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66874793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36022 + ... + 37832.

It is an arithmetic number, because the mean of its divisors is an integer number (4404972).

Almost surely, 2^66874797 is an apocalyptic number.

It is an amenable number.

66874797 is a deficient number, since it is larger than the sum of its proper divisors (38844531).

66874797 is a wasteful number, since it uses less digits than its factorization.

66874797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2198 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 66874797 is about 8177.7012051065. The cubic root of 66874797 is about 405.9016582574.

The spelling of 66874797 in words is "sixty-six million, eight hundred seventy-four thousand, seven hundred ninety-seven".