667212267810 has 32 divisors (see below), whose sum is σ = 1746883029312. Its totient is φ = 161748428480.

The previous prime is 667212267809. The next prime is 667212267829. The reversal of 667212267810 is 18762212766.

It is a super-2 number, since 2×667212267810² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 667212267810.

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, 1010927349 + ... + 1010928008.

It is an arithmetic number, because the mean of its divisors is an integer number (54590094666).

Almost surely, 2^667212267810 is an apocalyptic number.

667212267810 is an abundant number, since it is smaller than the sum of its proper divisors (1079670761502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667212267810 is a wasteful number, since it uses less digits than its factorization.

667212267810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021855378.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 667212267810 in words is "six hundred sixty-seven billion, two hundred twelve million, two hundred sixty-seven thousand, eight hundred ten".