1661656150 has 72 divisors (see below), whose sum is σ = 3922188696. Its totient is φ = 517910400.

The previous prime is 1661656147. The next prime is 1661656151. The reversal of 1661656150 is 516561661.

1661656150 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1661656150² = 5522202321665645000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661656151) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3879 + ... + 57778.

It is an arithmetic number, because the mean of its divisors is an integer number (54474843).

Almost surely, 2^1661656150 is an apocalyptic number.

1661656150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661656150 is an abundant number, since it is smaller than the sum of its proper divisors (2260532546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661656150 is a wasteful number, since it uses less digits than its factorization.

1661656150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61694 (or 61682 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1661656150 is about 40763.4168096837. The cubic root of 1661656150 is about 1184.4417840013.

The spelling of 1661656150 in words is "one billion, six hundred sixty-one million, six hundred fifty-six thousand, one hundred fifty".