7406740781 has 4 divisors (see below), whose sum is σ = 8080080864. Its totient is φ = 6733400700.

The previous prime is 7406740769. The next prime is 7406740799. The reversal of 7406740781 is 1870476047.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7406740781 - 2²⁶ = 7339631917 is a prime.

It is a super-2 number, since 2×7406740781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7406740741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336670025 + ... + 336670046.

It is an arithmetic number, because the mean of its divisors is an integer number (2020020216).

Almost surely, 2^7406740781 is an apocalyptic number.

It is an amenable number.

7406740781 is a deficient number, since it is larger than the sum of its proper divisors (673340083).

7406740781 is a wasteful number, since it uses less digits than its factorization.

7406740781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673340082.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 7406740781 is about 86062.4237457905. The cubic root of 7406740781 is about 1949.2866802311.

The spelling of 7406740781 in words is "seven billion, four hundred six million, seven hundred forty thousand, seven hundred eighty-one".