666146461045 has 16 divisors (see below), whose sum is σ = 906174944640. Its totient is φ = 466032826944.

The previous prime is 666146460977. The next prime is 666146461069. The reversal of 666146461045 is 540164641666.

It is a cyclic number.

It is not a de Polignac number, because 666146461045 - 2²³ = 666138072437 is a prime.

It is a super-2 number, since 2×666146461045² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666146461045.

It is a congruent number.

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, 269693689 + ... + 269696158.

It is an arithmetic number, because the mean of its divisors is an integer number (56635934040).

Almost surely, 2^666146461045 is an apocalyptic number.

666146461045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

666146461045 is a deficient number, since it is larger than the sum of its proper divisors (240028483595).

666146461045 is a wasteful number, since it uses less digits than its factorization.

666146461045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539389884.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 666146461045 in words is "six hundred sixty-six billion, one hundred forty-six million, four hundred sixty-one thousand, forty-five".