146990291666 has 4 divisors (see below), whose sum is σ = 220485437502. Its totient is φ = 73495145832.

The previous prime is 146990291653. The next prime is 146990291671. The reversal of 146990291666 is 666192099641.

It is a happy number.

146990291666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 95904799225 + 51085492441 = 309685^2 + 226021^2 .

It is a super-3 number, since 3×146990291666³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36747572915 + ... + 36747572918.

Almost surely, 2^146990291666 is an apocalyptic number.

146990291666 is a deficient number, since it is larger than the sum of its proper divisors (73495145836).

146990291666 is an equidigital number, since it uses as much as digits as its factorization.

146990291666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73495145835.

The product of its (nonzero) digits is 7558272, while the sum is 59.

The spelling of 146990291666 in words is "one hundred forty-six billion, nine hundred ninety million, two hundred ninety-one thousand, six hundred sixty-six".