3621166678 has 4 divisors (see below), whose sum is σ = 5431750020. Its totient is φ = 1810583338.

The previous prime is 3621166673. The next prime is 3621166691. The reversal of 3621166678 is 8766611263.

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

It is a super-2 number, since 2×3621166678² = 26225696219715111368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621166673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905291668 + ... + 905291671.

It is an arithmetic number, because the mean of its divisors is an integer number (1357937505).

Almost surely, 2^3621166678 is an apocalyptic number.

3621166678 is a deficient number, since it is larger than the sum of its proper divisors (1810583342).

3621166678 is a wasteful number, since it uses less digits than its factorization.

3621166678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810583341.

The product of its digits is 435456, while the sum is 46.

The square root of 3621166678 is about 60176.1304671545. The cubic root of 3621166678 is about 1535.6167423395.

The spelling of 3621166678 in words is "three billion, six hundred twenty-one million, one hundred sixty-six thousand, six hundred seventy-eight".