7400006781 has 8 divisors (see below), whose sum is σ = 9918334464. Its totient is φ = 4907508480.

The previous prime is 7400006777. The next prime is 7400006797. The reversal of 7400006781 is 1876000047.

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

It is not a de Polignac number, because 7400006781 - 2² = 7400006777 is a prime.

It is a super-2 number, since 2×7400006781² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7400006701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6456676 + ... + 6457821.

It is an arithmetic number, because the mean of its divisors is an integer number (1239791808).

Almost surely, 2^7400006781 is an apocalyptic number.

It is an amenable number.

7400006781 is a deficient number, since it is larger than the sum of its proper divisors (2518327683).

7400006781 is a wasteful number, since it uses less digits than its factorization.

7400006781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12914691.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 7400006781 is about 86023.2920841792. The cubic root of 7400006781 is about 1948.6957556043.

The spelling of 7400006781 in words is "seven billion, four hundred million, six thousand, seven hundred eighty-one".