66574799 has 2 divisors, whose sum is σ = 66574800. Its totient is φ = 66574798.

The previous prime is 66574757. The next prime is 66574813. The reversal of 66574799 is 99747566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66574799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66574799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66574709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33287399 + 33287400.

It is an arithmetic number, because the mean of its divisors is an integer number (33287400).

Almost surely, 2^66574799 is an apocalyptic number.

66574799 is a deficient number, since it is larger than the sum of its proper divisors (1).

66574799 is an equidigital number, since it uses as much as digits as its factorization.

66574799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 53.

The square root of 66574799 is about 8159.3381471784. The cubic root of 66574799 is about 405.2937948512.

The spelling of 66574799 in words is "sixty-six million, five hundred seventy-four thousand, seven hundred ninety-nine".