70640767 has 2 divisors, whose sum is σ = 70640768. Its totient is φ = 70640766.

The previous prime is 70640753. The next prime is 70640771. The reversal of 70640767 is 76704607.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70640767 - 2⁷ = 70640639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70646767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35320383 + 35320384.

It is an arithmetic number, because the mean of its divisors is an integer number (35320384).

Almost surely, 2^70640767 is an apocalyptic number.

70640767 is a deficient number, since it is larger than the sum of its proper divisors (1).

70640767 is an equidigital number, since it uses as much as digits as its factorization.

70640767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 70640767 is about 8404.8061845589. The cubic root of 70640767 is about 413.3822283613.

The spelling of 70640767 in words is "seventy million, six hundred forty thousand, seven hundred sixty-seven".