6697021545 has 16 divisors (see below), whose sum is σ = 11905816320. Its totient is φ = 3571744752.

The previous prime is 6697021519. The next prime is 6697021559. The reversal of 6697021545 is 5451207966.

It is not a de Polignac number, because 6697021545 - 2⁹ = 6697021033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6697021545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24803649 + ... + 24803918.

It is an arithmetic number, because the mean of its divisors is an integer number (744113520).

Almost surely, 2^6697021545 is an apocalyptic number.

It is an amenable number.

6697021545 is a deficient number, since it is larger than the sum of its proper divisors (5208794775).

6697021545 is a wasteful number, since it uses less digits than its factorization.

6697021545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49607581 (or 49607575 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 6697021545 is about 81835.3318866613. The cubic root of 6697021545 is about 1884.9242366714.

The spelling of 6697021545 in words is "six billion, six hundred ninety-seven million, twenty-one thousand, five hundred forty-five".