70661249 has 2 divisors, whose sum is σ = 70661250. Its totient is φ = 70661248.

The previous prime is 70661233. The next prime is 70661263. The reversal of 70661249 is 94216607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55606849 + 15054400 = 7457^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 70661249 - 2⁴ = 70661233 is a prime.

It is a super-2 number, since 2×70661249² = 9986024220480002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70661219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35330624 + 35330625.

It is an arithmetic number, because the mean of its divisors is an integer number (35330625).

Almost surely, 2^70661249 is an apocalyptic number.

It is an amenable number.

70661249 is a deficient number, since it is larger than the sum of its proper divisors (1).

70661249 is an equidigital number, since it uses as much as digits as its factorization.

70661249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 70661249 is about 8406.0245657504. The cubic root of 70661249 is about 413.4221773265.

The spelling of 70661249 in words is "seventy million, six hundred sixty-one thousand, two hundred forty-nine".