166645702 has 4 divisors (see below), whose sum is σ = 249968556. Its totient is φ = 83322850.

The previous prime is 166645697. The next prime is 166645711. The reversal of 166645702 is 207546661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 207546661 = 7 ⋅29649523.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41661424 + ... + 41661427.

It is an arithmetic number, because the mean of its divisors is an integer number (62492139).

Almost surely, 2^166645702 is an apocalyptic number.

166645702 is a deficient number, since it is larger than the sum of its proper divisors (83322854).

166645702 is an equidigital number, since it uses as much as digits as its factorization.

166645702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83322853.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 166645702 is about 12909.1325037742. The cubic root of 166645702 is about 550.2981325802.

It can be divided in two parts, 16664 and 5702, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 166645702 in words is "one hundred sixty-six million, six hundred forty-five thousand, seven hundred two".