16421667770 has 32 divisors (see below), whose sum is σ = 30042093456. Its totient is φ = 6462144000.

The previous prime is 16421667763. The next prime is 16421667791. The reversal of 16421667770 is 7776612461.

It can be written as a sum of positive squares in 8 ways, for example, as 5897164849 + 10524502921 = 76793^2 + 102589^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106790 + ... + 210350.

Almost surely, 2^16421667770 is an apocalyptic number.

16421667770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16421667770 is a deficient number, since it is larger than the sum of its proper divisors (13620425686).

16421667770 is a wasteful number, since it uses less digits than its factorization.

16421667770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103826.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 16421667770 in words is "sixteen billion, four hundred twenty-one million, six hundred sixty-seven thousand, seven hundred seventy".