5207813661 has 8 divisors (see below), whose sum is σ = 6964357504. Its totient is φ = 3461572800.

The previous prime is 5207813657. The next prime is 5207813687. The reversal of 5207813661 is 1663187025.

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

It is not a de Polignac number, because 5207813661 - 2² = 5207813657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5207813621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2574565 + ... + 2576586.

It is an arithmetic number, because the mean of its divisors is an integer number (870544688).

Almost surely, 2^5207813661 is an apocalyptic number.

It is an amenable number.

5207813661 is a deficient number, since it is larger than the sum of its proper divisors (1756543843).

5207813661 is a wasteful number, since it uses less digits than its factorization.

5207813661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151491.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 5207813661 is about 72165.1831633510. The cubic root of 5207813661 is about 1733.3455326516.

The spelling of 5207813661 in words is "five billion, two hundred seven million, eight hundred thirteen thousand, six hundred sixty-one".