166697954 has 16 divisors (see below), whose sum is σ = 265062456. Its totient is φ = 78355200.

The previous prime is 166697941. The next prime is 166697957. The reversal of 166697954 is 459796661.

166697954 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 158130625 + 8567329 = 12575^2 + 2927^2 .

It is a super-2 number, since 2×166697954² = 55576415735572232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166697896 and 166697905.

It is not an unprimeable number, because it can be changed into a prime (166697957) 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, 33764 + ... + 38384.

Almost surely, 2^166697954 is an apocalyptic number.

166697954 is a deficient number, since it is larger than the sum of its proper divisors (98364502).

166697954 is a wasteful number, since it uses less digits than its factorization.

166697954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701.

The product of its digits is 2449440, while the sum is 53.

The square root of 166697954 is about 12911.1561837041. The cubic root of 166697954 is about 550.3556421607.

The spelling of 166697954 in words is "one hundred sixty-six million, six hundred ninety-seven thousand, nine hundred fifty-four".