7406061561 has 6 divisors (see below), whose sum is σ = 10697644490. Its totient is φ = 4937374368.

The previous prime is 7406061521. The next prime is 7406061569. The reversal of 7406061561 is 1651606047.

7406061561 is a `hidden beast` number, since 7 + 40 + 606 + 1 + 5 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5107817961 + 2298243600 = 71469^2 + 47940^2 .

It is not a de Polignac number, because 7406061561 - 2⁶ = 7406061497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7406061569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 411447856 + ... + 411447873.

Almost surely, 2^7406061561 is an apocalyptic number.

It is an amenable number.

7406061561 is a deficient number, since it is larger than the sum of its proper divisors (3291582929).

7406061561 is a wasteful number, since it uses less digits than its factorization.

7406061561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822895735 (or 822895732 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 7406061561 is about 86058.4775661294. The cubic root of 7406061561 is about 1949.2270932948.

The spelling of 7406061561 in words is "seven billion, four hundred six million, sixty-one thousand, five hundred sixty-one".