642065100677 has 16 divisors (see below), whose sum is σ = 862073423232. Its totient is φ = 461825046720.

The previous prime is 642065100667. The next prime is 642065100679. The reversal of 642065100677 is 776001560246.

It is a cyclic number.

It is not a de Polignac number, because 642065100677 - 2¹⁴ = 642065084293 is a prime.

It is a super-2 number, since 2×642065100677² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642065100679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320710838 + ... + 320712839.

It is an arithmetic number, because the mean of its divisors is an integer number (53879588952).

Almost surely, 2^642065100677 is an apocalyptic number.

It is an amenable number.

642065100677 is a deficient number, since it is larger than the sum of its proper divisors (220008322555).

642065100677 is a wasteful number, since it uses less digits than its factorization.

642065100677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641423708.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 642065100677 in words is "six hundred forty-two billion, sixty-five million, one hundred thousand, six hundred seventy-seven".