66249151 has 2 divisors, whose sum is σ = 66249152. Its totient is φ = 66249150.

The previous prime is 66249109. The next prime is 66249167. The reversal of 66249151 is 15194266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66249151 - 2⁹ = 66248639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66249101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33124575 + 33124576.

It is an arithmetic number, because the mean of its divisors is an integer number (33124576).

Almost surely, 2^66249151 is an apocalyptic number.

66249151 is a deficient number, since it is larger than the sum of its proper divisors (1).

66249151 is an equidigital number, since it uses as much as digits as its factorization.

66249151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 66249151 is about 8139.3581442273. The cubic root of 66249151 is about 404.6318882483.

The spelling of 66249151 in words is "sixty-six million, two hundred forty-nine thousand, one hundred fifty-one".