7721067040 has 24 divisors (see below), whose sum is σ = 18241021260. Its totient is φ = 3088426752.

The previous prime is 7721067023. The next prime is 7721067043. The reversal of 7721067040 is 407601277.

It can be written as a sum of positive squares in 2 ways, for example, as 7429750416 + 291316624 = 86196^2 + 17068^2 .

It is a super-2 number, since 2×7721067040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7721066987 and 7721067005.

It is not an unprimeable number, because it can be changed into a prime (7721067043) 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, 24128175 + ... + 24128494.

Almost surely, 2^7721067040 is an apocalyptic number.

It is an amenable number.

7721067040 is an abundant number, since it is smaller than the sum of its proper divisors (10519954220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7721067040 is a wasteful number, since it uses less digits than its factorization.

7721067040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48256684 (or 48256676 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 7721067040 is about 87869.6024800386. The cubic root of 7721067040 is about 1976.4800775327.

The spelling of 7721067040 in words is "seven billion, seven hundred twenty-one million, sixty-seven thousand, forty".