70778879 has 8 divisors (see below), whose sum is σ = 73332000. Its totient is φ = 68233312.

The previous prime is 70778861. The next prime is 70778893. The reversal of 70778879 is 97887707.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70778879 - 2¹⁶ = 70713343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70778879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70778839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22877 + ... + 25785.

It is an arithmetic number, because the mean of its divisors is an integer number (9166500).

Almost surely, 2^70778879 is an apocalyptic number.

70778879 is a deficient number, since it is larger than the sum of its proper divisors (2553121).

70778879 is a wasteful number, since it uses less digits than its factorization.

70778879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777.

The product of its (nonzero) digits is 1382976, while the sum is 53.

The square root of 70778879 is about 8413.0184238477. The cubic root of 70778879 is about 413.6514585380.

The spelling of 70778879 in words is "seventy million, seven hundred seventy-eight thousand, eight hundred seventy-nine".