1661226654 has 48 divisors (see below), whose sum is σ = 3429479952. Its totient is φ = 536425344.

The previous prime is 1661226631. The next prime is 1661226709. The reversal of 1661226654 is 4566221661.

It is a super-3 number, since 3×1661226654³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1519332 + ... + 1520424.

It is an arithmetic number, because the mean of its divisors is an integer number (71447499).

Almost surely, 2^1661226654 is an apocalyptic number.

1661226654 is an abundant number, since it is smaller than the sum of its proper divisors (1768253298).

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

1661226654 is a wasteful number, since it uses less digits than its factorization.

1661226654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1278 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 1661226654 is about 40758.1483141715. The cubic root of 1661226654 is about 1184.3397258139.

The spelling of 1661226654 in words is "one billion, six hundred sixty-one million, two hundred twenty-six thousand, six hundred fifty-four".