660120707545 has 16 divisors (see below), whose sum is σ = 854015565312. Its totient is φ = 486938612160.

The previous prime is 660120707537. The next prime is 660120707557. The reversal of 660120707545 is 545707021066.

It is not a de Polignac number, because 660120707545 - 2³ = 660120707537 is a prime.

It is a super-2 number, since 2×660120707545² (a number of 24 digits) contains 22 as substring.

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, 5514717 + ... + 5633146.

It is an arithmetic number, because the mean of its divisors is an integer number (53375972832).

Almost surely, 2^660120707545 is an apocalyptic number.

660120707545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

660120707545 is a deficient number, since it is larger than the sum of its proper divisors (193894857767).

660120707545 is a wasteful number, since it uses less digits than its factorization.

660120707545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11148792.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 660120707545 in words is "six hundred sixty billion, one hundred twenty million, seven hundred seven thousand, five hundred forty-five".