666214026 has 16 divisors (see below), whose sum is σ = 1332824544. Its totient is φ = 222005264.

The previous prime is 666214019. The next prime is 666214033. The reversal of 666214026 is 620412666.

It is an interprime number because it is at equal distance from previous prime (666214019) and next prime (666214033).

It is a super-2 number, since 2×666214026² = 887682256878257352, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8161 + ... + 37403.

It is an arithmetic number, because the mean of its divisors is an integer number (83301534).

Almost surely, 2^666214026 is an apocalyptic number.

666214026 is an abundant number, since it is smaller than the sum of its proper divisors (666610518).

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

666214026 is a wasteful number, since it uses less digits than its factorization.

666214026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33045.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 666214026 is about 25811.1221375592. The cubic root of 666214026 is about 873.3827109519.

The spelling of 666214026 in words is "six hundred sixty-six million, two hundred fourteen thousand, twenty-six".