6520023477 has 20 divisors (see below), whose sum is σ = 10625224896. Its totient is φ = 3951528840.

The previous prime is 6520023473. The next prime is 6520023511. The reversal of 6520023477 is 7743200256.

It is a happy number.

It is not a de Polignac number, because 6520023477 - 2² = 6520023473 is a prime.

It is a super-2 number, since 2×6520023477² = 85021412281262339058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520023473) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3657933 + ... + 3659714.

Almost surely, 2^6520023477 is an apocalyptic number.

It is an amenable number.

6520023477 is a deficient number, since it is larger than the sum of its proper divisors (4105201419).

6520023477 is a wasteful number, since it uses less digits than its factorization.

6520023477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317670 (or 7317661 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 6520023477 is about 80746.6623273061. The cubic root of 6520023477 is about 1868.1699691313.

The spelling of 6520023477 in words is "six billion, five hundred twenty million, twenty-three thousand, four hundred seventy-seven".