660213401535 has 80 divisors (see below), whose sum is σ = 1261553356800. Its totient is φ = 329358654144.

The previous prime is 660213401521. The next prime is 660213401557. The reversal of 660213401535 is 535104312066.

660213401535 is a `hidden beast` number, since 6 + 6 + 0 + 213 + 401 + 5 + 35 = 666.

It is not a de Polignac number, because 660213401535 - 2¹⁴ = 660213385151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660213401535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 64882 + ... + 1150928.

It is an arithmetic number, because the mean of its divisors is an integer number (15769416960).

Almost surely, 2^660213401535 is an apocalyptic number.

660213401535 is a deficient number, since it is larger than the sum of its proper divisors (601339955265).

660213401535 is a wasteful number, since it uses less digits than its factorization.

660213401535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086162 (or 1086153 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 660213401535 in words is "six hundred sixty billion, two hundred thirteen million, four hundred one thousand, five hundred thirty-five".