661151054 has 16 divisors (see below), whose sum is σ = 1044347040. Its totient is φ = 313299360.

The previous prime is 661151041. The next prime is 661151059. The reversal of 661151054 is 450151166.

It is a super-3 number, since 3×661151054³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661151059) 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, 60917 + ... + 70944.

It is an arithmetic number, because the mean of its divisors is an integer number (65271690).

Almost surely, 2^661151054 is an apocalyptic number.

661151054 is a deficient number, since it is larger than the sum of its proper divisors (383195986).

661151054 is a wasteful number, since it uses less digits than its factorization.

661151054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131995.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 661151054 is about 25712.8577563833. The cubic root of 661151054 is about 871.1646242778.

The spelling of 661151054 in words is "six hundred sixty-one million, one hundred fifty-one thousand, fifty-four".