667523537026520 has 32 divisors (see below), whose sum is σ = 1523081873221920. Its totient is φ = 263248718826240.

The previous prime is 667523537026441. The next prime is 667523537026537. The reversal of 667523537026520 is 25620735325766.

It is a self number, because there is not a number n which added to its sum of digits gives 667523537026520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117521746637 + ... + 117521752316.

It is an arithmetic number, because the mean of its divisors is an integer number (47596308538185).

Almost surely, 2^{667523537026520} is an apocalyptic number.

It is an amenable number.

667523537026520 is an abundant number, since it is smaller than the sum of its proper divisors (855558336195400).

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

667523537026520 is a wasteful number, since it uses less digits than its factorization.

667523537026520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235043499035 (or 235043499031 counting only the distinct ones).

The product of its (nonzero) digits is 95256000, while the sum is 59.

The spelling of 667523537026520 in words is "six hundred sixty-seven trillion, five hundred twenty-three billion, five hundred thirty-seven million, twenty-six thousand, five hundred twenty".