70778611 has 6 divisors (see below), whose sum is σ = 73136436. Its totient is φ = 68494500.

The previous prime is 70778563. The next prime is 70778621. The reversal of 70778611 is 11687707.

It is not a de Polignac number, because 70778611 - 2¹⁷ = 70647539 is a prime.

It is a super-2 number, since 2×70778611² = 10019223550178642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70778621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35865 + ... + 37786.

It is an arithmetic number, because the mean of its divisors is an integer number (12189406).

Almost surely, 2^70778611 is an apocalyptic number.

70778611 is a deficient number, since it is larger than the sum of its proper divisors (2357825).

70778611 is an equidigital number, since it uses as much as digits as its factorization.

70778611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73713 (or 73682 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 37.

The square root of 70778611 is about 8413.0024961366. The cubic root of 70778611 is about 413.6509364485.

The spelling of 70778611 in words is "seventy million, seven hundred seventy-eight thousand, six hundred eleven".