70740781 has 16 divisors (see below), whose sum is σ = 78140160. Its totient is φ = 63789120.

The previous prime is 70740767. The next prime is 70740793. The reversal of 70740781 is 18704707.

It is a cyclic number.

It is not a de Polignac number, because 70740781 - 2⁹ = 70740269 is a prime.

It is a super-2 number, since 2×70740781² = 10008516192979922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70740701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31971 + ... + 34111.

It is an arithmetic number, because the mean of its divisors is an integer number (4883760).

Almost surely, 2^70740781 is an apocalyptic number.

It is an amenable number.

70740781 is a deficient number, since it is larger than the sum of its proper divisors (7399379).

70740781 is a wasteful number, since it uses less digits than its factorization.

70740781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 70740781 is about 8410.7538901100. The cubic root of 70740781 is about 413.5772267808.

The spelling of 70740781 in words is "seventy million, seven hundred forty thousand, seven hundred eighty-one".