668853955 has 32 divisors (see below), whose sum is σ = 1002792960. Its totient is φ = 416065920.

The previous prime is 668853953. The next prime is 668853971. The reversal of 668853955 is 559358866.

It is a happy number.

It is not a de Polignac number, because 668853955 - 2¹ = 668853953 is a prime.

It is a super-2 number, since 2×668853955² = 894731226238284050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 668853896 and 668853905.

It is not an unprimeable number, because it can be changed into a prime (668853953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212886 + ... + 216004.

It is an arithmetic number, because the mean of its divisors is an integer number (31337280).

Almost surely, 2^668853955 is an apocalyptic number.

668853955 is a deficient number, since it is larger than the sum of its proper divisors (333939005).

668853955 is a wasteful number, since it uses less digits than its factorization.

668853955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699.

The product of its digits is 7776000, while the sum is 55.

The square root of 668853955 is about 25862.2109457022. The cubic root of 668853955 is about 874.5348079635.

The spelling of 668853955 in words is "six hundred sixty-eight million, eight hundred fifty-three thousand, nine hundred fifty-five".