2660166651 has 8 divisors (see below), whose sum is σ = 3560691024. Its totient is φ = 1766543360.

The previous prime is 2660166643. The next prime is 2660166661. The reversal of 2660166651 is 1566610662.

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

It is a cyclic number.

It is not a de Polignac number, because 2660166651 - 2³ = 2660166643 is a prime.

It is a super-2 number, since 2×2660166651² = 14152973222185111602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2660166601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724370 + ... + 1725911.

It is an arithmetic number, because the mean of its divisors is an integer number (445086378).

Almost surely, 2^2660166651 is an apocalyptic number.

2660166651 is a deficient number, since it is larger than the sum of its proper divisors (900524373).

2660166651 is a wasteful number, since it uses less digits than its factorization.

2660166651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450541.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2660166651 is about 51576.8034197545. The cubic root of 2660166651 is about 1385.5949172151.

The spelling of 2660166651 in words is "two billion, six hundred sixty million, one hundred sixty-six thousand, six hundred fifty-one".