2166447577402 has 8 divisors (see below), whose sum is σ = 3294187412436. Its totient is φ = 1068385106592.

The previous prime is 2166447577369. The next prime is 2166447577421. The reversal of 2166447577402 is 2047757446612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2165603616801 + 843960601 = 1471599^2 + 29051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×2166447577402³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7419340873 + ... + 7419341164.

Almost surely, 2^{2166447577402} is an apocalyptic number.

2166447577402 is a deficient number, since it is larger than the sum of its proper divisors (1127739835034).

2166447577402 is a wasteful number, since it uses less digits than its factorization.

2166447577402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14838682112.

The product of its (nonzero) digits is 15805440, while the sum is 55.

The spelling of 2166447577402 in words is "two trillion, one hundred sixty-six billion, four hundred forty-seven million, five hundred seventy-seven thousand, four hundred two".